Section 2 Character of classification and class notations
Clasification Society 2024 - Version 9.40
Clasifications Register Rules and Regulations - Rules and Regulations for the Classification of Ships, July 2022 - Part 1 Regulations - Chapter 2 Classification Regulations - Section 2 Character of classification and class notations

Section 2 Character of classification and class notations

2.1 Definitions

Note For the purpose of class notations, the definitions given in Pt 1, Ch 2, 2.1 Definitions 2.1.2 to Pt 1, Ch 2, 2.1 Definitions 2.1.12 will apply.

2.1.2  Clear water. Water having sufficient depth to permit the normal development of wind generated waves.

2.1.3  Fetch. The extent of clear water across which a wind has blown before reaching the ship.

2.1.4  Sheltered water. Water where the fetch is six nautical miles or less.

2.1.5  Reasonable weather. Wind strengths of force six or less in the Beaufort scale, associated with sea states sufficiently moderate to ensure that green water is taken on board the ship's deck at infrequent intervals only or not at all.

2.1.6  Type notation. A notation indicating that the ship has been arranged and constructed in compliance with particular Rules intended to apply to that type of ship. Type notations that may be assigned are listed in Table 2.2.1 Type notations.

Table 2.2.1 Type notations

Dry cargo Tanker Passenger
Anchor handler Chemical tanker Passenger ferry
AHTS (Anchor Handler Tug Supply) Double hull oil tanker Passenger/vehicle ferry
Barge Liquefied gas carrier Passenger ship
Bulk carrier Liquefied gas tanker Passenger yacht
Cable laying vessel Moored Liquefied gas carrier Roll on-Roll off passenger ferry
Container ship Moored Liquefied gas tanker Roll on-Roll off passenger ship
Diving support vessel Moored Liquefied gas storage unit Sailing passenger ship
Dredger Moored oil storage tanker  
Escort tug Moored oil storage unit  
Fire fighting Oil barge  
Fishing vessel Oil or bulk carrier  
Hopper barge Oil recovery ship  
Hopper dredger Oil tanker  
Icebreaker Ore or oil carrier  
Icebreaker(+)    
Launch    
Livestock carrier    
Offshore support vessel    
Offshore supply vessel    
Offshore tug    
Offshore well stimulation ship    
Ore carrier    
Pipe laying vessel    
Pontoon    
Reclamation ship    
Refrigerated cargo ship    
Research    
Roll on-Roll off cargo ship    
Seismographic support vessel    
Shipborne barge    
Subsea support vessel    
Standby vessel    
Stern trawler    
Split hopper barge    
Split hopper dredger    
Trawler    
Tug    
Vehicle carrier    

2.1.7  Cargo notation. A notation indicating that the ship has been designed, modified or arranged to carry one or more particular cargoes, e.g. sulphuric acid. Ships with one or more particular cargo notations are not thereby prevented from carrying other cargoes for which they are suitable.

2.1.8  Special duties notation. A notation indicating that the ship has been designed, modified or arranged for special duties other than those implied by the type and cargo notations, e.g. research. Ships with special duties notations are not thereby prevented from performing any other duties for which they may be suitable.

2.1.9  ShipRight notation. Where one or more of LR’s ShipRight notation procedures have been satisfactorily applied, then a notation showing the associated characters of the procedure(s) within brackets will, at the Owner’s request, be entered in column 4 of the Register Book, preceded by the word ShipRight, see Pt 1, Ch 2, 2.3 Class notations (hull) 2.3.17. Other ShipRight procedures that have been satisfactorily applied will similarly be shown as descriptive notes and will appear in column 6 of the Register Book, see Pt 1, Ch 2, 2.8 Descriptive notes 2.8.2.

2.1.10  Special features notation. A notation indicating that the ship incorporates special features which significantly affect the design, see Table 2.2.2 Special features notations.

Table 2.2.2 Special features notations

Special features notation Description See also
BC Assigned to bulk carriers of length 150 m or above Pt 4, Ch 7, 1.4 Class notation for CSR bulk carriers 1.4.2
Bottom Strengthened for (Operating Aground) (Loading and Unloading Aground) Assigned where the bottom structure has been additionally strengthened for loading and unloading aground Pt 3, Ch 9, 7 Bottom strengthening for loading and unloading aground and Pt 4, Ch 12, 1.3 Class notations 1.3.4
BLS Bow Loading System. Assigned to tankers equipped with bow loading arrangements to facilitate the transfer of cargo oil from offshore loading terminals Pt 7, Ch 6, 1.2 Class notations 1.2.1
BoxMax Assigned to container vessels that have an approved onboard lashing program to calculate forces acting on a container and its container securing arrangements. The notation may be accompanied by one of the following supplementary letter sequences, V or V,W or V,W,L or M. These allow the Master to use weather dependent factors based on the environmental severity of the planned voyage to determine the forces acting on the container and the container securing arrangements, potentially increasing the flexibility of the carriage of containers onboard the ship.

V (Voyage dependency) denotes that weather dependent factors based on an annual basis are available for selected specific voyages or routes.

W (Weather dependency) denotes that weather dependent factors based on a seasonal basis are available for selected specific voyages or routes

L (Limited duration voyage) denotes that weather dependent factors suitable for application to a limited duration voyage in coastal waters are available.

M (Ship motion monitoring) denotes that the ship’s Master shall select the weather dependent factors and that in-service maximum ship motion and environmental conditions will be recorded to demonstrate safe operation.

LR will supply weather dependent factors applicable to the list of sea areas requested by the Owner, see also Table 14.1.1 BoxMax notation features .

Pt 3, Ch 4 Longitudinal Strength and Pt 3, Ch 14 Cargo Securing Arrangements
Cargo Loading on (Tank Top/ Tween/ Deck (s) Plating/ Hatch cover(s)) limited to .... tonnes/m2 Assigned where cargo loading on tank tops, decks and/or hatch covers are limited to a specified maximum value which is less than the normal Rule loading
Carriage of Oils with a F.P. not exceeding 60°C Assigned to non-oil tankers where the ship is suitably constructed and arranged for the carriage of oils with a flash point not exceeding 60°C (closed cup test) Pt 4, Ch 9 Double Hull Oil Tankers
Pt 4, Ch 10 Single Hull Oil Tankers
Carriage of Oils with a F.P. exceeding 60°C Assigned where only the carriage of oils having a flash point exceeding 60°C (closed cup test) is contemplated Pt 4, Ch 9, 1.1 General 1.1.5
(Specified Cargo(es)) only Assigned where arrangements have been approved for the carriage of a specific product(s) Pt 4, Ch 9, 1.1 General 1.1.7
CC Assigned where structures are fitted with an approved corrosion control system Pt 1, Ch 3 Periodical Survey Regulations
CCSA Certified Container Securing Arrangements. Assigned where freight container securing arrangements are fitted, and the design and construction of the system is in accordance with LR Rules and loose fittings are supplied Pt 3, Ch 14 Cargo Securing Arrangements
CG Cargo Gear. Assigned where cargo gear is included in class at the Owner's request Pt 3, Ch 9, 6 Lifting appliances and support arrangements
CL Cargo Lift(s). Assigned where cargo lift(s) are included in class at the Owner's request Pt 3, Ch 9, 6 Lifting appliances and support arrangements
CR Cargo Ramp(s). Assigned where cargo ramp(s) are included in class at the Owner's request Pt 3, Ch 9, 6 Lifting appliances and support arrangements
CRC –/– –kW –%/–% Carriage of refrigerated containers. The CRC notation may be applied to any ship which has the ability to carry refrigerated containers operating at their design condition with a 24-hour average external ambient air temperature of 35°C Pt 7, Ch 10, 1.1 General
  The following descriptive notations may be appended, giving details of electrical power and type of cargo:  
  –/– No. of hold-stowed refrigerated containers/No. of deck-stowed refrigerated containers e.g. 230/140  
  –kW Power generating capacity dedicated to supplying the container plug-in points, e.g. 2,800 kW  
–%/–% Stowage ratio of deep frozen and chilled cargoes, e.g. 60%/40%  
Container Cargoes in (((all) Hold (No(s)))( and on Upper Deck)(( and on (all ) Hatch Cover( s) (No( s))...) Assigned where general cargo ships carry container cargoes. Pt 3, Ch 4 Longitudinal Strength
Deck No(s) ... Strengthened for Carriage of Roll on-Roll off Cargoes Assigned where it is proposed either to stow wheeled vehicles on the deck or to use wheeled vehicles for cargo handling and the deck and supporting structure has been specially considered Pt 3, Ch 9, 3 Decks loaded by wheeled vehicles
DSPM4 Dual Single Point Mooring. Assigned to a ship provided with a dual mooring line arrangement at a single-point mooring Pt 3, Ch 13, 8 Anchor windlass design and testing
DWA Deep Water Anchoring. Assigned to a ship with a Rule length L not less than 135 m, subject to the Rules in Pt 3, Ch 13 Ship Control Systems, which has increased equipment for anchoring in deep waters with a depth up to 120 m Pt 3, Ch 13, 10 Anchoring equipment in deep and unsheltered water
ECL(1, 2, 3) Assigned to vessels where work spaces, movement about the ship, fall protection and working arrangements on deck have been specially considered for performing container securing, inspection and other related tasks Rules for Ergonomic Container Lashing, July 2022
ELD Assigned when ergonomic lighting design has been applied Pt 6, Ch 2, 23 Ergonomic Lighting Design – ELD optional notation and Pt 16, Ch 2, 22 Ergonomic Lighting Design – ELD optional notation
EWP Enhanced Weather Protection. Assigned where a vessel, subject to the Rules in Pt 4, Ch 4 Offshore Support Vessels, has increased scantlings for superstructure, windows and side scuttles. Pt 4, Ch 4, 9 Enhanced weather protection
Fire-Fighting Ship 1, 2, 3 (with water spray) Designed where fire protection and fire-fighting equipment is provided. Type 1, 2 or 3 signifies the capacity of the fire-fighting equipment. The total discharge capacity of the monitors in m3/h is shown in brackets. ‘With water spray’ signifies that a ship is provided with a water spray system which will provide an effective cooling spray of water Pt 7, Ch 3 Fire-fighting Ships
Hatch Covers may be omitted in Hold (No(s) …) Assigned where the omission of hatch covers has been specially considered based upon the model tests or alternative means to determine the quantity of water likely to ingress the cargo holds and the means by which it is effectively and safely discharged Pt 3, Ch 9, 10 Omission of hatch covers

Pt 5, Ch 13, 3.8 Maintenance of integrity of bulkheads

Heavy Deck Loads Assigned where decks are strengthened for loading in excess of Rule basic minimum, e.g. ‘Upper deck aft of Fr. 50 strengthened for load of 10 tonnes/m2 Pt 3, Ch 6 Aft End Structure
Helideck Assigned where a designated helicopter landing platform or other deck area with fire-fighting appliances and other equipment necessary for the safe operation of helicopters are provided. Pt 3, Ch 9, 5 Helicopter landing areas
Occasional Helicopter Landing Area Assigned where an area on a ship designated for occasional or emergency landing of helicopters is provided. Pt 3, Ch 9, 5 Helicopter landing areas
Hold (No(s)) ... may be empty at draughts not (less than) (exceeding) ...m Assigned where particular loading arrangements have been specially considered Pt 4, Ch 7 Bulk Carriers
Ice Class Assigned where a ship is strengthened to navigate in specific ice conditions. Supplementary Ice Class notations are given in Table 2.2.3 Notations for ice and cold operations Pt 8, Ch 1 Application and Pt 8, Ch 2 Ice Operations - Ice Class
Icebreaker Assigned designed for icebreaking duties Pt 8, Ch 1 Application and Pt 8, Ch 2 Ice Operations - Ice Class
LA Mandatory Lifting Appliance(s). Assigned where the lifting appliance is considered to be an essential feature, e.g. cranes on crane barges, lifting arrangements for diving on diving support vessels, and is mandatory Pt 3, Ch 9, 6 Lifting appliances and support arrangements
Mandatory Lifting Appliance(s). Assigned where the lifting appliance is considered to be an essential feature and has been classed by a recognised classification society other than LR and later transferred into class with LR. In such cases, a new Register of Ship’s Lifting Appliances & Cargo Handling Gear (LA.1) will be issued in accordance with LR’s Code for Lifting Appliances in a Marine Environment, July 2022. Pt 3, Ch 9, 6 Lifting appliances and support arrangements
LFPL Low flash point liquids. Assigned to offshore supply vessels intended for the carriage of liquids with flashpoint below 60°C (closed cup test) in bulk Pt 4, Ch 4 Offshore Support Vessels
For Liquefaction and Storage of (Methane, etc.) in Independent Gas Tanks (Type B, etc.), Maximum Vapour Pressure ( ) MPa, Minimum Temperature Minus ( ) °C Assigned where ships of Category 1B or 2 which have process plants installed solely for the purposes of the physical liquefaction of impure feedstock gases at low temperature and the storage of the purified liquefied gases (where the chemical treatment of the impurities is an incidental process) Pt 7, Ch 2, 2.2 Additional notations
LTMOOR Long-term Terminal Mooring System Pt 7, Ch 8, 1.2 Classification notations 1.2.3 Pt 3, Ch 10, 16 Long-term nearshore positional mooring system of the Rules and Regulations for the Classification of Offshore Units, July 2022
Machinery on deck Assigned where machinery other than lifting appliances, and anchoring and mooring equipment is installed on deck Pt 3, Ch 9, 9 Strengthening for machinery on deck
Marpol 20.1.3 Assigned to double hull oil tankers not meeting the Rule minimum double side width requirements but which comply with MARPOL Annex 1, Regulation 20.1.3 Pt 4, Ch 9, 1.4 Class notation and applicable Rules for non-CSR Double Hull Oil Tankers 1.4.3
Marpol 21.1.2 Assigned to double hull oil tankers of less than 5000 tonnes deadweight which have a complete double hull in accordance with MARPOL Annex I, Regulation 21.1.2 Pt 4, Ch 9, 1.4 Class notation and applicable Rules for non-CSR Double Hull Oil Tankers 1.4.4
Movable Decks Assigned where all movable decks comply with LR requirements. Movable decks other than those specifically indicated in LR Rule requirements are not a classification item Pt 3, Ch 9, 4 Movable decks
Oil Recovery Assigned when a ship is equipped for oil recovery operations Pt 7, Ch 5, 2 Oil recovery
Oil Recovery (F.P. >60°C) Assigned when a ship is equipped for oil recovery operations restricted to oils with a flash point greater than 60°C Pt 7, Ch 5, 2 Oil recovery
Petrol in Hold (No( s))... Assigned to ships that can carry motor vehicles with fuel in their tanks for self-propulsion, in specified locations. It does not apply to ships that are designed primarily for the carriage of motor vehicles Specific requirements will be advised upon request
PL Passenger Lift(s). Assigned where the passenger lift(s) are included in class at the Owner's request Pt 3, Ch 9, 6 Lifting appliances and support arrangements
PM (T1) [or (T2) or (T3)] For ships fitted with a positional mooring system (PM). The supplementary notation (T1) [or (T2) or (T3)] may be applied if the system is thruster-assisted. The encircled numeral defines the thruster allowance Pt 7, Ch 8, 1.2 Classification notations 1.2.1
PMC (T1) [or (T2) or (T3)] For ships fitted with a positional mooring system for mooring in close proximity to other ships or installations (PMC). The supplementary notation (T1) [or (T2) or (T3)] may be applied if the system is thruster-assisted. The encircled numeral defines the thruster allowance Pt 7, Ch 8, 1.2 Classification notations 1.2.1
RD Relative Density. Assigned where a ship has tanks appraised for a maximum permissible relative density greater than 1,025 Pt 4, Ch 1 General Cargo Ships
Pt 4, Ch 4 Offshore Support Vessels
Self-Discharging (Unloading) Assigned where a ship fitted with self-unloading equipment whose structural aspect has been specially approved Pt 4, Ch 12, 1 General
SLS Stern Loading System. Assigned to tankers equipped with stern loading arrangements to facilitate the transfer of cargo oil from offshore loading terminals Pt 7, Ch 6, 1 General
Specialised for the Carriage of ... Assigned to a vessel which has been designed for the carriage of specified cargo other than that applied by the type notation Pt 4, Ch 4, 1 General
SPM4 Single Point Mooring. Assigned to a ship provided with a single mooring line arrangement at a single point mooring Pt 3, Ch 13, 8 Anchor windlass design and testing
Strengthened to carry cargoes which may liquefy (IMSBC Group A) Assigned to ore carriers which are to carry ‘Group A cargo’ and which have satisfied the LR requirements for Classification as a specially constructed or fitted cargo ship for confining cargo shift, as stipulated in the IMSBC Code. In accordance with the IMSBC Code, vessels with this notation are eligible for the carriage of Group A cargo where the moisture content rises above the Transportable Moisture Limit (TML) after loading. This notation is assigned at the request of the Owner. Pt 4, Ch 11, 1.3 Class notation 1.3.4
Strengthened for Heavy Cargoes (any) Hold (No(s) ............... may be empty) Assigned to a bulk carrier of less than 150 m in length or a ship designed for the carriage of heavy cargoes. If only certain holds are strengthened for heavy cargoes, they will be specified Pt 4, Ch 1 General Cargo Ships and Pt 4, Ch 7, 1 General
HNLS Hazardous and noxious liquids system. Assigned to Offshore Support Vessels complying with the aspects relevant to classification of the Code for the transport and handling of hazardous and noxious liquid substances in bulk on offshore support vessels (OSV Chemical Code)/ Pt 4, Ch 4, 8 Transport and handling of hazardous and noxious liquid substances in bulk
Hold No(s) ... Strengthened for Regular Discharge by Heavy Grabs Assigned to bulk carriers where cargoes are regularly discharged by heavy grabs and the thickness of the plating of the hold inner bottom, hopper and transverse bulkhead bottom stool is increased Pt 3, Ch 9, 7.1 Application
Submersible to a depth of ...m below Upper Deck in Harbour only Assigned to a ship that is designed so that it can be submersed to a specified depth in harbour only
Timber Deck Cargoes Assigned where a cargo of timber is carried on an uncovered part of the freeboard or superstructure deck (does not include wood pulp or similar cargo) and the requirements of the 1966 Load Line Convention concerning timber deck cargoes or other National Regulations are complied with Pt 3, Ch 9, 2 Timber deck cargoes
TLS Submerged Turret Loading System. Assigned to tankers equipped with submerged turret loading systems to facilitate the transfer of cargo oil from offshore loading to terminals Pt 7, Ch 6, 1 General
Winterisation Assigned to a ship that is intended to navigate in cold climates and may be exposed to low temperatures that may cause equipment to freeze due to ice accretion from atmospheric icing or sea spray or due to freezing of liquid within a system. Protection measures are provided and operational procedures are specified to ensure that equipment is suitably protected to enable operation in low temperatures. Supplementary Winterisation notations are given in Table 2.2.3 Notations for ice and cold operations Pt 8, Ch 1 Application and Pt 8, Ch 2 Ice Operations - Ice Class
WDL(+) Weather Deck Load. Assigned where the weather deck load scantlings have been approved for a loading greater than a design head of 3,5 m Pt 4, Ch 1 General Cargo Ships and Pt 4, Ch 4 Offshore Support Vessels
W2W Walk To Work. Assigned where a personnel transfer system is included in class at the Owner’s request Pt 3, Ch 9, 6 Lifting appliances and support arrangements

Table 2.2.3 Notations for ice and cold operations

Notation Description Conditions Application See also
Ice Class 1E For ships with length less than 150 m Light and very light ice conditions Hull, Machinery Pt 8, Ch 2, 4 Hull requirements for light ice conditions – Ice Classes 1D and 1E and Pt 8, Ch 2, 5 Machinery requirements for light ice conditions – Ice Classes 1D and 1E
Ice Class 1D Hull strengthening in forward region only      
Ice Class 1C FS   Ice Class 1C; ships with such structure, engine output and other properties that they are capable of navigating in light ice conditions, with the assistance of icebreakers when necessary;    
Ice Class 1B FS   Ice Class 1B; ships with such structure, engine output and other properties that they are capable of navigating in moderate ice conditions, with the assistance of icebreakers when necessary    
Ice Class 1A FS Finnish Swedish Ice Class Rules Ice Class 1A; ships with such structure, engine output and other properties that they are capable of navigating in difficult ice conditions, with the assistance of icebreakers when necessary Hull, Machinery Pt 8, Ch 2, 6 Hull requirements for first-year ice conditions – Ice Classes 1AS FS, 1A FS, 1B FS, 1C FS and 1D and Pt 8, Ch 2, 7 Machinery requirements for first-year ice conditions – Ice Classes 1AS FS(+), IAS FS, 1A FS, 1A FS(+), 1B FS, 1B FS(+), 1C FS(+) and 1C FS
Ice Class 1AS FS   Ice Class 1A Super; ships with such structure, engine output and other properties that they are normally capable of navigating in difficult ice conditions without the assistance of icebreakers    
Ice Class 1C FS(+)   Ice Class 1C; ships with such structure, engine output and other properties that they are capable of navigating in light ice conditions, with the assistance of icebreakers when necessary    
Ice Class 1B FS(+) Finnish Swedish Ice Class Rules with enhanced engine power for icebreaking capability Ice Class 1B; ships with such structure, engine output and other properties that they are capable of navigating in moderate ice conditions, with the assistance of icebreakers when necessary Hull, Machinery Pt 8, Ch 2, 8 Hull requirements for first-year ice conditions – Ice classes 1AS FS(+), 1A FS(+), 1B FS(+) and 1C FS(+) and Pt 8, Ch 2, 9 Machinery requirements for first-year ice conditions - Ice classes 1AS FS(+), IAS FS, 1A FS(+), 1A FS, 1B FS(+), 1B FS, 1C FS(+) and 1C FS
Ice Class 1A FS(+)   Ice Class 1A; ships with such structure, engine output and other properties that they are capable of navigating in difficult ice conditions, with the assistance of icebreakers when necessary    
Ice Class 1AS FS(+)   Ice Class 1A Super; ships with such structure, engine output and other properties that they are normally capable of navigating in difficult ice conditions without the assistance of icebreakers    
Ice Class PC7   Summer/autumn operation in thin first-year ice which may include old ice inclusions    
Ice Class PC6   Summer/autumn operation in medium first-year ice which may include old ice inclusions    
Ice Class PC5   Year-round operation in medium first-year ice which may include old ice inclusions    
Ice Class PC4 IACS Polar Ship Rules Year-round operation in thick first-year ice which may include old ice inclusions Hull, Machinery Pt 8, Ch 2, 10 Hull strengthening requirements for navigation in multi-year ice conditions – Ice Classes PC1, PC2, PC3, PC4, PC5, PC6, PC7 and Icebreaker and Pt 8, Ch 2, 11 Machinery strengthening requirements for navigation in multi-year ice conditions – Ice Classes PC1, PC2, PC3, PC4, PC5, PC6, PC7 and Icebreaker
Ice Class PC3   Year-round operation in second-year ice which may include multi-year ice inclusions    
Ice Class PC2   Year-round operation in moderate multi-year ice conditions    
Ice Class PC1   Year-round operation in all Polar waters    
Winterisation H(t) Hull construction materials   Hull, materials Ch 1, 2 Materials for hull construction at low temperatures – Winterisation H of the Rules for the Winterisation of Ships, July 2022
Winterisation C(t) Short duration Low temperature operations    
Winterisation B(t) Seasonal duration   Equipment and systems Ch 1, 3 Materials for equipment and components at low temperatures – Winterisation M of the Rules for the Winterisation of Ships, July 2022
Winterisation A(t) Prolonged duration      

2.1.11  Service restriction notation. A notation indicating that a ship has been classed on the understanding that it will be operated only in suitable areas or conditions which have been agreed by the Classification Committee, e.g. protected waters service.

2.1.12  Linked means connected, while in operation, to an attendant ship (which may be on shore, submerged or afloat) by a restraining line, suspension cable or umbilical cord.

2.1.13  Laid-up notation. A ship not under repair or not actively employed may be assigned the laid-up notation in order to maintain the ship in class subject to agreement by the Classification Committee. A general examination of the hull and machinery is to be carried out in lieu of the Annual Survey. An Underwater Examination (UWE) is to be carried out in lieu of the Special Survey. See Pt 1, Ch 3, 1.1 Frequency of surveys 1.1.2, Pt 1, Ch 3, 2.1 General 2.1.5, Pt 1, Ch 3, 5.1 General 5.1.6 and Pt 1, Ch 3, 11.1 Annual, Intermediate and Bottom Surveys 11.1.2.

2.2 Character symbols

2.2.1 All ships, when classed, will be assigned one or more character symbols as applicable. For the majority of ships, the character assigned will be 100A1, 100A1 or 100A1.

2.2.2 A full list of character symbols for which ships may be eligible is as follows:

= This distinguishing mark will be assigned, at the time of classing, to new ships constructed under LR's Special Survey in compliance with the Rules, and to the satisfaction of the Classification Committee.
= This distinguishing mark, will be assigned to ships built under supervision of another IACS member society and later assigned class with LR. For such ships the class notations will be reviewed separately and equivalent notations will be assigned.
100 = This character figure will be assigned to all ships considered suitable for sea-going service.
A = This character letter will be assigned to all ships which have been built or accepted into class in accordance with LR's Rules and Regulations, and which are maintained in good and efficient condition.
1 = This character figure will be assigned to:
= (a) Ships having on board, in good and efficient condition, anchoring and/or mooring equipment in accordance with the Rules.
= (b) Ships classed for a special service, having on board, in good and efficient condition, anchoring and/or mooring equipment approved by the Classification Committee as suitable and sufficient for the particular service.
N = This character letter will be assigned to ships on which the Classification Committee has agreed that anchoring and mooring equipment need not be fitted in view of their particular service.
T = This character letter will be assigned to ships which are intended to perform their primary designed service function only while they are anchored, moored, towed or linked, and which have, in good and efficient condition, adequately attached anchoring, mooring, towing or linking equipment which has been approved by the Classification Committee as suitable and sufficient for the intended service.

2.2.3 For classification purposes, the character figure 1, or either of the character letters N or T, is to be assigned.

2.2.4 In cases where the anchoring and/or mooring equipment is found to be seriously deficient in quality or quantity, the class of the ship will be liable to be withheld.

2.3 Class notations (hull)

2.3.1 When considered necessary by the Classification Committee, or when requested by an Owner and agreed by the Classification Committee, a class notation will be appended to the character of classification assigned to the ship. This class notation will consist of one of, or a combination of: a type notation, a cargo notation, a special duties notation, a special features notation and/or a service restriction notation, e.g ` 100A1 Oil Tanker F.P. exceeding 60°C in No. 4 tanks ESP Baltic Service Ice Class 1B'.

2.3.2 Details of the ship types and particular cargoes for which special Rules apply are given in those Chapters of Pt 3 Ship Structures (General), Pt 4 Ship Structures (Ship Types) and Pt 7 Other Ship Types and Systems which apply to such ships and cargoes.

2.3.3 Details of the more common special features and the conditions relevant to the assignment of special features notations, together with the form of such notations, are incorporated in Pt 3 Ship Structures (General), Pt 4 Ship Structures (Ship Types) and Pt 7 Other Ship Types and Systems as applicable.

2.3.4 Service restriction notations will generally be assigned in one of the forms shown in Pt 1, Ch 2, 2.3 Class notations (hull) 2.3.6 to Pt 1, Ch 2, 2.3 Class notations (hull) 2.3.10, but this does not preclude Owners or Shipbuilders requesting special consideration for other forms in unusual cases.

2.3.5 Where a service notation is applicable, certain exemptions may be granted. Where these affect statutory requirements, such as Load Lines, the Owner or shipbuilder is to obtain the authorisation of the Flag State. Such exemptions are to be recorded on the Class certificate and any applicable statutory certificate.

2.3.6  Protected waters service. Service in sheltered water adjacent to sand banks, reefs, breakwaters or other coastal features, and in sheltered water between islands, e.g. `Protected Waters Service at Storebaelt Bridge'.

2.3.7  Extended protected waters service. Service in protected waters and also for short distances (generally less than 15 nautical miles) beyond protected waters in `reasonable weather', e.g. `Extended Protected Waters Service from the Port of Lagos'.

2.3.8  Specified coastal service. Service along a coast, the geographical limits of which will be indicated in the Register Book, and for a distance out to sea generally not exceeding 21 nautical miles, unless some other distance is specified for `coastal service' by the Administration with which the ship is registered, or by the Administration of the coast off which it is operating, as applicable, e.g. `Indonesian coastal service'.

2.3.9  Specified route service. Service between two or more ports or other geographical features which will be indicated in the Register Book,

e.g.

  • `London to Rotterdam service'
  • `London, Rotterdam and Hamburg service'.

2.3.10  Specified operating area service. Service within one or more geographical area(s) which will be indicated in the Register Book,

e.g.

  • `Pacific Tropical Zone service'
  • `Great Lakes and St.Lawrence to Pt. du Monts service'
  • `Red Sea, Eastern Mediterranean and Black Sea service'.

2.3.11  *IWS. This notation (In-water Survey) may be assigned to a ship where the applicable requirements of LR's Rules and Regulations are complied with, see Pt 1, Ch 3, 4.3 In-Water Surveys; Pt 3, Ch 1, 5.2 Plans and supporting calculations and Pt 3, Ch 1, 5.3 Plans to be supplied to the ship; Pt 3, Ch 2, 3.5 External hull protection; Pt 3, Ch 13, 2.16 Pintles and Pt 5, Ch 6, 3.12 Sternbushes and sterntube arrangements. The notation will be withdrawn for ESP ships upon reaching 15 years of age.

2.3.12  ESP. This notation (Enhanced Survey Programme) will be assigned to oil tankers, combination carriers, chemical tankers, bulk carriers and ore carriers, as defined in Pt 1, Ch 3, 1.5 Definitions which are subject to an enhanced survey programme as detailed in Pt 1, Ch 3, 3 Intermediate Surveys - Hull and machinery requirements, Pt 1, Ch 3, 6 Special Survey - Bulk carriers - Hull requirements, Pt 1, Ch 3, 7 Special Survey - Oil tankers (including ore/oil ships and ore/bulk/oil ships) - Hull requirements and Pt 1, Ch 3, 8 Special Survey - Chemical Tankers - Hull requirements.

2.3.13  CSR. This notation will be assigned to bulk carriers and double hull oil tankers compliant with the IACS Common Structural Rules for Bulk Carriers and Oil Tankers (CSR), see Pt 4, Ch 7, 1.2 Application 1.2.1 and Pt 4, Ch 9, 1.2 Application and ship arrangement 1.2.1. Additional mandatory and non-mandatory class notations for CSR bulk carriers are given in Pt 1, Ch 2, 2.3 Class notations (hull) 2.3.14.

2.3.14  Class notations for CSR bulk carriers. In general, CSR bulk carriers less than 150 m in length are to comply with the requirements of Pt 4, Ch 7, 1.4 Class notation for CSR bulk carriers and the IACS Common Structural Rules (CSR) and will be eligible for one of the following mandatory class notations:

{any holds may be empty} This class notation is normally assigned to a ship designed to carry dry bulk cargoes of cargo density 1,0 tonne/m3 and above, with an approved arrangement of loaded holds such that any hold may be empty at the maximum draught.
{holds a, b, ... may be empty} This class notation is normally assigned to a ship designed to carry dry bulk cargoes of cargo density 1,0 tonne/m3 and above with specified holds empty at maximum draught.

In general, CSR bulk carriers equal to or greater than 150 m in length are to comply with the requirements of Pt 4, Ch 7, 1.5 Class notation for non-CSR bulk carriers and the IACS Common Structural Rules (CSR) and will be eligible for one of the following mandatory class notations:

BC-A, holds a, b, … may be empty This class will be assigned for bulk carriers designed to carry dry bulk cargoes of cargo density 1,0 tonne/m3 and above with specified holds empty at maximum draught.
BC-B This class will be assigned for bulk carriers designed to carry dry bulk cargoes of cargo density 1,0 tonne/m3 and above with all cargo holds loaded.
BC-C This class will be assigned for bulk carriers designed to carry dry bulk cargoes of cargo density less than 1,0 tonne/m3 with all cargo holds loaded.

The following additional notations and annotations are to be provided giving further detailed description of limitations to be observed during operation as a consequence of the design loading condition applied during the design:

{Maximum cargo density in t/m3} For notations BC-A and BC-B if the maximum cargo density is less than 3,0 tonnes/m3
{No MP} For all notations when the vessel has not been designed for loading and unloading in multiple ports in accordance with the conditions specified in IACS Common Structural Rules (CSR), Pt 1, Ch 4, Sec 8,4.2.2.
GRAB [X] Where the net thickness of plating of inner bottom, hopper tank sloping plate, transverse lower stool, transverse bulkhead plating and inner hull up to a height of 3,0 m above the lowest point of the inner bottom, excluding bilge wells comply with IACS Common Structural Rules (CSR), Pt 2, Ch 1, 6 for BC-A and BC-B, see IACS Common Structural Rules (CSR), Pt 1, Ch 1, Sec 1,3.2.1.
{Block loading} For additional service feature BC-A, when the ship is intended to operate in alternate block load condition, see IACS Common Structural Rules(CSR), Pt 1, Ch 4, Sec 8, 4.2.3, item d.
(allowed combination of specified empty holds) Annotation for notation BC-A.

2.3.15  ESN. This notation (Enhanced Survivability Notation) will be assigned to non-CSR bulk carriers which are designed to withstand the individual flooding of all cargo holds, see Pt 4, Ch 7, 1.3 General class notations 1.3.2.

2.3.16  LI. This notation will be assigned where an approved loading instrument has been installed as a classification requirement.

2.3.17  ShipRight( ). Where one or more of LR’s ShipRight Procedures for the following have been satisfactorily applied, then a notation showing the associated characters of the procedure(s) within brackets will, at the Owner’s request, be entered in column 4 of the Register Book, preceded by the word ShipRight, e.g. ShipRight(CM, SDA, FDA plus(25,NA)). The requirements pertaining to these notations and the ShipRight procedures are given in Pt 3, Ch 16 ShipRight Procedures for the Design, Construction and Lifetime Care of Ships.

ACS() This ShipRight notation (Anti-Corrosion System) will be assigned when a specified area or areas of the ship have been protected against corrosion in accordance with the relevant ShipRight procedures. The ACS( ) notation with the extension of one or more of the following associated supplementary characters shown in brackets, detailing the specified protected area or areas, may be assigned;
  B for protective coating system of water ballast tanks;
  D for protective coating system of double-side skin spaces;
  C for protective coating system of cargo oil tanks;
  C* when corrosion resistant steel has been used in cargo oil tanks;
  V for protective coating system of void spaces.
CM This ShipRight notation (Construction Monitoring), which complements the ShipRight SDA, FDA, FDA plus() , FDA ICE, FDA SPR, and WDA notations, will be assigned when the controls in construction tolerances detailed in the relevant ShipRight procedures have been applied and verified. The ShipRight notation CM is mandatory upon application of any of the following ShipRight notations: SDA, FDA, FDA plus(), FDA ICE, FDA SPR and WDA
FDA This ShipRight notation (Fatigue Design Assessment) will be assigned when an appraisal has been made of the fatigue performance of the hull structure in accordance with the relevant ShipRight procedures.
FDA plus() This ShipRight notation (Fatigue Design Assessment plus) will be assigned when an appraisal has been made for a higher level of fatigue performance than that made for the assignment of FDA. The appraisal may be made based upon a specific trading pattern, which is to be expressed in terms of either a Worldwide trading route, as defined in the relevant ShipRight procedures, or a North Atlantic trading route (that utilises the wave data from IACS Recommendation 34). The ShipRight notation FDA plus() is to be followed by the number of years that the vessel has been assessed for the specific trading pattern shown in brackets, for either the Worldwide or North Atlantic trading routes, denoted by WW and NA respectively, e.g. FDA plus (25, NA).

FDA ICE
This ShipRight notation (Fatigue Design Ice) will be assigned when an appraisal has been made for the fatigue performance of the hull structure when navigating through ice in accordance with the relevant ShipRight procedures.
FDA SPR This ShipRight notation (Springing Fatigue Assessment) will be assigned when an appraisal has been made of the fatigue performance of the hull structure taking into account the effects due to springing (the continuous vibrational response of the hull girder due to waves) in accordance with the relevant ShipRight procedures.
MP This ShipRight notation will be assigned to ore carriers where an assessment for multiple port loading and unloading has been carried out in accordance with the relevant ShipRight procedures and the ShipRight notation SDA has been assigned.
PRDA() This ShipRight notation (Parametric Roll Design Assessment) will be assigned to container ships where an assessment for parametric roll resonance has been carried out using a calculation procedure agreed by LR. The PRDA() notation with the extension of one of the following associated supplementary characters shown in brackets, detailing the specified assessment level, may be assigned:

1 This level indicates that a parametric roll avoidance assessment has been carried out;

2 This level includes the assessment carried out in level 1 and, in addition, time domain numerical simulations to assess the parametric roll risk.

SDA This ShipRight notation (Structural Design Assessment) will be assigned when direct calculations in accordance with the relevant ShipRight procedures have been applied. The ShipRight notation SDA is mandatory upon application of any of the following ShipRight notations:FDA, FDA plus(), FDA ICE, FDA SPR , SLDA(), WDA1 and WDA2.
VIBM() This ShipRight notation (Vibration Measurement) will be assigned when measurement of vibration has been carried out and verified in accordance with the relevant ShipRight procedures. The VIBM() notation with the extension of one or more of the following associated supplementary characters shown in brackets may be assigned:

H for hull vibration measurement;

M for machinery vibration measurement.

SLDA() This ShipRight notation (Slamming Load Design Assessment) will be assigned when direct calculations of wave slamming loads and the associated hull structural strength have been carried out using a calculation procedure agreed by LR. The SLDA() notation with the extension of one or two of the following associated supplementary characters shown in brackets, detailing the specified assessment area or areas, may be assigned:

B for slamming load and hull strength assessment of ship’s bow flare region;

S for slamming load and hull strength assessment of ship’s stern counter region.

WDA1 This ShipRight notation (Whipping Design Assessment Level 1) will be assigned when an appraisal has been made of the dynamic response of the hull structure due to wave impact loads (Whipping) in accordance with the relevant ShipRight procedures.
WDA2 This ShipRight notation (Whipping Design Assessment Level 2) will be assigned when an appraisal has been made of the dynamic response of the hull structure due to wave impact loads (Whipping) in accordance with the relevant ShipRight procedures.

2.3.18 When the ShipRight notations SDA, FDA, FDA plus(), FDA ICE, FDA SPR, PRDA(), SLDA(), WDA1, and WDA2 are assigned, the precise technical conditions of the appraisal will be made available to Owners.

2.3.19  EU notations. The following notations may be assigned to passenger ships that comply with the requirements of the European Council Directive 98/18/EC of 17 March 1998 on safety Rules and Standards for passenger ships, and subsequent revisions:

EU(A) This class notation will be assigned to a passenger ship engaged on domestic voyages other than voyages covered by Classes B, C and D.
EU(B) This class notation will be assigned to a passenger ship engaged on domestic voyages in the course of which it is at no time more than 20 miles from the line of coast, where shipwrecked persons can land, corresponding to the medium tide height.
EU(C) This class notation will be assigned to a passenger ship engaged on domestic voyages in sea areas where the probability of exceeding 2,5 m significant wave height is smaller than 10 per cent over a one-year period for all-year-round operation, or over a specific restricted period of the year for operation exclusively in such a period (e.g. summer period operation), in the course of which it is at no time more than 15 miles from a place of refuge, nor more than 5 miles from the line of coast, where shipwrecked persons can land, corresponding to the medium tide height.
EU(D) This class notation will be assigned to a passenger ship engaged on domestic voyages in sea areas where the probability of exceeding 1,5 m significant wave height is smaller than 10 per cent over a one-year period for all-year-round operation, or over a specific restricted period of the year for operation exclusively in such a period (e.g. summer period operation), in the course of which it is at no time more than 6 miles from a place of refuge, nor more than 3 miles from the line of coast, where shipwrecked persons can land, corresponding to the medium tide height.

2.3.20 The following notations may be assigned to ships that comply with standards for noise and vibration levels in different spaces at the time of delivery and during the ship's life if substantial changes to the machinery installation or interior arrangements are made.

PAC Passenger Accommodation Comfort. This notation indicates that the passenger accommodation meets the acceptance criteria.
CAC Crew Accommodation Comfort. This notation indicates that the crew accommodation and work areas meet the acceptance criteria.
PCAC Passenger and Crew Accommodation Comfort. This notation indicates that the passenger and crew spaces both meet the acceptance criteria.

Following the PAC or CAC notation, numerals 1, 2 or 3 will indicate the acceptance criteria to which the noise and vibration levels have been assessed. In the case of the PCAC notation, two numerals will be assigned. The first will indicate the acceptance criteria for passenger accommodation, whilst the second will indicate the crew comfort criteria. These notations are optional and are primarily intended to apply to passenger ships. Spaces that comply with the minimum Rule requirement for noise levels indicated in Pt 7, Ch 12 Passenger and Crew Accommodation Comfort, will meet the requirements of section 4 of IMO Resolution MSC.337(91) – Adoption of the Code on Noise Levels on Board Ships – (Adopted on 30 November 2012)The Annex below is consolidated into Resolution MSC.337(91), when measured in accordance with the requirements of Chapters 2 and 3 of that Resolution

2.3.21 The notation EPN (escort performance numeral) may be assigned to escort tugs which carry out full-scale performance trials in accordance with the requirements of Pt 4, Ch 3, 9.3 Performance numeral and trials. (F,B,V,C) may be appended to the notations where:

F Maximum steering force, in tonnes.
B Maximum braking force, in tonnes.
V Speed, in knots, at which F and B are determined.
C Time, in seconds, required for the escort tug in manoeuvring from maintained oblique position of the tug giving it a maximum steering force on one side of the assisted vessel to a mirror position on the other side.

2.3.22 The escort performance numerals in the EPN notation may be given the prefix CFD: where a Computational Fluid Dynamics prediction of the performance of the escort tug during escort operation in indirect towing mode is made in accordance with Pt 4, Ch 3, 9.4 Computational Fluid Dynamics Predicted Performance, in lieu of full-scale performance trials.

2.3.23 Where escort performance numerals are predicted using computational fluid dynamics, the escort performance numeral “C” will be omitted.

2.3.24 RIGGING. The RIGGING notation will be assigned where a new vessel is fitted with a rig used for propulsion by wind force which is in accordance with the Rules. See Pt 3, Ch 9, 11 Wind propulsion systems.

2.3.25 RIGGING*. Upon request, the RIGGING* notation will be assigned where an existing vessel is fitted with a rig used for propulsion by wind force which is in accordance with the Rules. See Pt 3, Ch 9, 11 Wind propulsion systems.

2.4 Class notations (machinery)

2.4.1 The following class notations are associated with the machinery construction and arrangement, and may be assigned as considered appropriate by the Classification Committee:

LMC This notation will be assigned when the propelling and essential auxiliary machinery, see Pt 1, Ch 2, 2.9 Application notes 2.9.1, have been constructed, installed and tested under LR’s Special Survey and in accordance with LR’s Rules and Regulations for the Classification of Ships, see Pt 1, Ch 2, 3.2 New construction surveys.

LMC This notation will be assigned when:

  • the propelling arrangements for propellers, propulsion shafting and multiple input/output gearboxes, steering systems, pressure vessels and electrical equipment for essential systems have been constructed, installed and tested under LR’s Special Survey and are in accordance with LR’s Rules and Regulations, see Pt 1, Ch 2, 3.2 New construction surveys.
  • other items of machinery and gearing arrangements for propulsion and electrical power generation and other auxiliary machinery for essential services are in compliance with LR Rules and supplied with the Manufacturer’s certificate. This notation is assigned subject to the conditions in Pt 1, Ch 2, 2.9 Application notes 2.9.2 being complied with.
  • the system arrangements of propelling and essential auxiliary machinery, see Pt 1, Ch 2, 2.9 Application notes 2.9.1, are appraised and found to be acceptable to LR.

LMC This notation will be assigned to existing ships in service that will be accepted or transferred into LR class when:

  • the propelling and essential auxiliary machinery, see Pt 1, Ch 2, 2.9 Application notes 2.9.1, have neither been constructed nor installed under LR’s Special Survey.
  • the existing machinery installation and arrangement have been tested and found to be acceptable to LR.

MCH This notation will be assigned when the:

IGS This notation will be assigned when a ship intended for the carriage of oil in bulk, or for the carriage of liquid chemicals in bulk, is fitted with an approved system for producing gas for inerting the cargo tanks.

2.4.2 The following class notations are associated with the machinery control and automation, and may be assigned as considered appropriate by the Classification Committee:

UMS This notation may be assigned when the arrangements are such that the ship can be operated with the machinery spaces unattended. It denotes that the control engineering equipment has been arranged, installed and tested in accordance with LR's Rules, or is equivalent thereto.

CCS This notation may be assigned when the arrangements are such that the machinery may be operated with continuous supervision from a centralised control station. It denotes that the control engineering equipment has been arranged, installed and tested in accordance with LR's Rules, or is equivalent thereto.

ICC This notation may be assigned when the arrangements are such that the control and supervision of ship operational functions are computer based. It denotes that the control engineering equipment has been arranged, installed and tested in accordance with LR's Rules, or is equivalent thereto.

IP This notation may be assigned to a ship classed with LR when the arrangements of the machinery are such that the propulsion equipment and all the essential auxiliary machinery is integrated with the power unit for operation under all normal sea-going and manoeuvring conditions. The system is to be bridge controlled and the propulsion equipment is to incorporate an emergency means of propulsion in the event of failure in the prime mover. It also denotes that the machinery and control equipment have been arranged, installed and tested in accordance with LR's Rules.

2.4.3 The following class notation is associated with vessels capable of being operated unmanned, and may be assigned as considered appropriate by the Classification Committee:

Unmanned Assigned when a vessel is designed and constructed such that it may be operated unmanned, i.e. without crew, passengers or other persons on board.

2.4.4 The following class notations are associated with dynamic positioning arrangements, and may be assigned as considered appropriate by the Classification Committee:

DP(CM) This notation may be assigned when a ship is fitted with centralised remote manual controls for position keeping and with position reference system(s) and environmental sensor(s). It denotes that the machinery and control engineering equipment has been arranged, installed and tested in accordance with LR's Rules, or is equivalent thereto.

DP(AM) This notation may be assigned when a ship is fitted with automatic main and manual standby controls for position keeping and with postition reference system(s) and environmental sensor(s). It denotes that the machinery and control engineering has been arranged, installed and tested in accordance with LR's Rules, or is equivalent thereto.

DP(AA) This notation may be assigned when a ship is fitted with automatic main and automatic standby controls for position keeping and with position reference system(s) and environmental sensor(s). It denotes that the machinery and control engineering equipment has been arranged, installed and tested in accordance with LR's Rules, or is equivalent thereto.

DP(AAA) This notation may be assigned when a ship is fitted with automatic main and automatic standby controls for position keeping, together with an additional/emergency automatic control unit located in a separate compartment and with position reference systems and environmental sensors. It denotes that the machinery and control engineering equipment has been arranged, installed and tested in accordance with LR's Rules, or is equivalent thereto.

PCR()() This rating supplements the DP() notation. This rating indicates the calculated percentage of time that a unit is capable of holding heading and position under a standard set of environmental conditions (North Sea).
Two rating numerals are calculated:

  • The first numeral represents the percentage of time that the ship can remain on station when subjected to a set of standard environmental conditions (North Sea fully developed) with all thrusters operating.
  • The second numeral represents the percentage of time that the ship can remain on station when subjected to a set of standard environmental conditions (North Sea fully developed) with the most effective thruster being inoperative.
  • A typical rating might be (95),(70).

The foregoing dynamic positioning notations may be supplemented with a Performance Capability Rating (PCR). This rating indicates the calculated percentage of time that a ship is capable of holding heading and position under a standard set of environmental conditions (North Sea), see Pt 7, Ch 4 Dynamic Positioning Systems.

2.4.5 The following class notations are associated with navigation safety, and may be assigned as considered appropriate by the Classification Committee:

NAV1 This notation will be assigned when the bridge layout and level of equipment are such that the ship is considered suitable for safe periodic operation under the supervision of a single watchkeeper on the bridge. It denotes that the navigational installation has been arranged, installed and tested in accordance with LR's Rules, or is equivalent thereto.

IBS This additional notation will be assigned where an integrated bridge system is fitted to provide electronic chart display, track planning and automatic track following, centralised navigation information display, and bridge alarm management. It denotes that the integrated bridge system has been arranged, installed and tested in accordance with LR's Rules, or is equivalent thereto. For assignment of this notation, in addition to satisfying LR Rules, or equivalent thereto, for navigational function integration:

  1. the layout of the bridge and the equipment located on the bridge is to satisfy the requirements of a relevant International or National Ergonomic or Human-centred Design Standard, or an acceptable equivalent, to the satisfaction of LR; or

  2. the notation NAV1 is also to be assigned; or

  3. where the bridge is not intended to operate a periodic one man watch, the layout of the bridge and the equipment on the bridge are to satisfy the requirements for the assignment of the notation NAV1 to the satisfaction of LR with the exception of requirements identified by LR Rules that may be relaxed in such cases.

2.4.6 Machinery class notations will not be assigned to ships the hulls of which are not classed or intended to be classed with LR.

2.4.7 The notations LMC, []LMC, LMC and MCH will, in general, not be assigned to non-propelled craft, but individual cases will be considered on their merits.

Table 2.2.4 Machinery Class Notations

Machinery Notations
See Pt 1, Ch 2, 2.4 Class notations (machinery), Pt 1, Ch 2, 2.5 Class notations (machinery special features), Pt 1, Ch 2, 2.6 Class notations (refrigerated cargo installations (RMC), controlled atmosphere (CA) systems and carriage of refrigerated containers (CRC))
LMC
Propulsion and essential machinery
OPS
Operation of Services by connection to an external electrical Power Supply
Lloyd’s LMC
Refrigerated Machinery
LMC
Propulsion and essential machinery
PM
Positional Mooring System
Lloyd’s LMC
Refrigerated Machinery
LMC
Propulsion and essential machinery
PMC
Positional Mooring System for mooring in Close proximity to other vessels or installations
Double Dagger – Suitable for carriage of fruit
MCH
Propulsion and essential machinery
LTMOOR

Long-term Terminal Mooring System for nearshore mooring

Lloyd’s RMC (LG)
Reliquefaction and/or refrigeration equipment is fitted
LFPF( )
Machinery installation fuelled by low flashpoint fuel
IGS
Inert Gas System
PMR
Propulsion System Redundancy
Lloyd’s RMC (LG)
Reliquefaction and/or refrigeration equipment is fitted
UMS
Unattended Machinery Spaces
PSMR
Propulsion and Steering System Redundancy
Lloyd’s RMC (BC)
Refrigerated Chemical tanker
CCS
Centralised Control Station
PSMR*
Propulsion and Steering System Redundancy in Separate Compartments
Lloyd’s RMC (BC)
Refrigerated Chemical Tanker
ICC
Integrated Computer Control
PMRL
Propulsion System Redundancy with Limited Capacity
TC
Chemical Tanker temperature Control Systems
IP
Integrated Propulsion
PMRL*
Propulsion System Redundancy in Separate Compartments with Limited Capacity
(CA)
Controlled Atmosphere
DP(CM)
Dynamic Position (Centralised Remote Manual Controls)
SMRL
Steering System Redundancy with Limited Capacity
CA (%O2, %CO2) Controlled Atmosphere
DP(AM)
Dynamic Position (Automatic main and Manual standby Controls)
SMRL*
Steering System Redundancy in Separate Compartments with Limited Capacity
RH
Relative Humidity
DP(AA)
Dynamic Position (Automatic main and Automatic standby Controls)
PSMRL
Propulsion and Steering System Redundancy with Limited Capacity
EGCS( )

Exhaust Gas Cleaning System

DP(AAA)
Dynamic Positioning (Automatic main and Automatic standby controls with additional/emergency Automatic control)
PSMRL*
Propulsion and Steering System Redundancy in Separate Compartments with Limited Capacity
BWTS

Ballast Water Treatment System

PCR()()
Performance Capability Rating
CAC1(1 or 2 or 3)
Crew Accommodation Comfort
BWTS*

Type Approved Ballast Water Treatment System

NAV1
Navigation Equipment
PAC1 (or 2 or 3)
Passenger Accommodation Comfort
 
IBS
Integrated Bridge System
PCAC1 (or 2 or 3), 1 (or 2 or 3)
Passenger and Crew Accommodation
 

2.5 Class notations (machinery special features)

2.5.1 The following class notation is associated with onshore power supply arrangements and may be assigned as considered appropriate by the Classification Committee, upon application from the Owners:

OPS Assigned when the machinery, electrical and control engineering arrangements installed on board to permit continued operation of services by connection to an external electrical power supply have been assessed.

2.5.2 The following class notations are associated with positional mooring systems, or thruster-assisted positional mooring systems, and may be assigned as considered appropriate by the Classification Committee:

PM Assigned when a positional mooring system is fitted. This notation can be supplemented by a Thrust-Assisted notation (T1) [or (T2) or (T3)].
PMC Assigned when a positional mooring system for mooring in close proximity to other vessels or installations is fitted. This notation can be supplemented by a Thrust-Assisted notation (T1) [or (T2) or (T3)].
LTMOOR Assigned when a positional mooring system is fitted to a nearshore, inshore or at-shore terminal which complies with the requirements of Pt 3, Ch 10, 16 Long-term nearshore positional mooring system of the Rules and Regulations for the Classification of Offshore Units, July 2022.
Note
This notation is not intended to apply to vessels where station-keeping capabilities may be suspended for short periods during adverse weather conditions, unless they are planned to do so, and a subsequent loss of position allowed.

2.5.3 The following class notations are associated with machinery redundancy and may be assigned as considered appropriate by the Classification Committee:

PMR This notation will be assigned where the main propulsion systems are arranged such that, in the event of a single failure in equipment, the ship will retain not less than 50 per cent of the installed prime mover capacity and not less than 50 per cent of the installed propulsion systems. It also denotes that the installation has been arranged, installed and tested in accordance with LR Rules.
PMR* This notation will be assigned where the main propulsion systems are arranged such that, in the event of a single failure in equipment, the ship will retain not less than 50 per cent of the installed prime mover capacity and not less than 50 per cent of the installed propulsion systems and where the machinery is installed in separate compartments such that, in the event of the loss of one compartment, the ship will retain availability of propulsion power. It also denotes that the installation has been arranged, installed and tested in accordance with LR Rules.
SMR This notation will be assigned where the steering systems for manoeuvring are arranged so that steering capability will continue to be available in the event of a single failure in the steering gear equipment or loss of power supply or control system for any steering system. It also denotes that the installation has been arranged, installed and tested in accordance with LR’s Rules.
SMR* This notation will be assigned where the steering systems for manoeuvring are arranged so that steering capability will continue to be available in the event of a single failure in the steering gear equipment or loss of power supply or control system for any steering system and where the steering systems are installed in separate compartments such that, in the event of the loss of one compartment, steering capability will continue to be available. It also denotes that the installation has been arranged, installed and tested in accordance with LR’s Rules.
PSMR This notation will be assigned where the main propulsion and steering systems are configured such that, in the event of a single failure in equipment, the ship will retain not less than 50 per cent of the installed prime mover capacity and not less than 50 per cent of the installed propulsion systems and retain steering capability. It also denotes that the installation has been arranged, installed and tested in accordance with LR’s Rules.
PSMR* This notation will be assigned where the main propulsion and steering systems are configured such that, in the event of a single failure in equipment, the ship will retain not less than 50 per cent of the installed prime mover capacity and not less than 50 per cent of the installed propulsion systems and retain steering capability. The propulsion and steering arrangements are to be installed in separate compartments such that, in the event of the loss of one compartment, the ship will retain availability of propulsion power and manoeuvring capability. It also denotes that the installation has been arranged, installed and tested in accordance with LR’s Rules.

The foregoing machinery redundancy notations may be supplemented with the additional L character which indicates a limited capability.

2.5.4 The following class notations are associated with comfort control and may be assigned as considered appropriate by the Classification Committee:

CAC1 (or 2 or 3)
Assigned when noise and vibration levels in crew accommodation and work areas have been assessed. Numerals 1 or 2 or 3 indicate the acceptance criterion to which the noise and vibration levels have been assessed. Primarily intended to apply to passenger ships. If requested, however, any ship can be assessed for compliance.
PAC1 (or 2 or 3)
Assigned when noise and vibration levels in passenger accommodation have been assessed. Numerals 1 or 2 or 3 indicate the acceptance criterion to which the noise and vibration levels have been assessed. Primarily intended to apply to passenger ships. If requested, however, any ship can be assessed for compliance.
PCAC1 (or 2 or 3), (1 or 2 or 3)
Assigned when noise and vibration levels in passenger and crew spaces have been assessed. Numerals 1 or 2 or 3 indicate the acceptance criterion to which the noise and vibration levels have been assessed. Two numerals will be assigned, the first for the acceptance criteria for passenger accommodation, the second for crew comfort criteria. Primarily intended to apply to passenger ships. If requested, however, any ship can be assessed for compliance.

2.5.5 The following class notation is associated with low flashpoint fuelled vessels and may be assigned as considered appropriate by the Classification Committee:

LFPF(xx,yy) Ships complying with the requirements of LR’s Rules and Regulations and fuelled by gas or other low-flashpoint fuel will be eligible for assignment of LR’s Low Flash Point Fuel notation, LFPF(xx,yy) where ‘xx’ identifies the applicable Rules and Regulations and ‘yy’ identifies the type of fuel. The notation indicates that the gas or other low-flashpoint fuelled machinery has been designed, constructed, arranged, installed and tested in accordance with LR’s Rules and Regulations.
  With reference to ‘xx’, the following identifiers are used:

GF Ships complying with LR’s Rules and Regulations for the Classification of Ships using Gases or other Low-flashpoint Fuels, July 2022 (incorporating the IMO IGF Code).

GC Ships complying with LR’s Rules and Regulations for the Construction and Classification of Ships for the Carriage of Liquefied Gases in Bulk, July 2022 (incorporating the IMO IGC Code).

With reference to ‘yy’, the following identifiers are used:

NG Natural gas

EG Ethane gas

PG Petroleum gas (considered to include pure propane or butane or any mixture of the two)

ML Methyl alcohol (methanol)

EL Ethyl alcohol (ethanol)

HY Hydrogen

AM Ammonia

2.5.6 The following class notations are associated with Ballast Water Treatment Systems and may be assigned as considered appropriate by the Classification Committee:

BWTS Assigned to ships with a Ballast Water Treatment System (BWTS) which is approved and installed in accordance with LR’s Rules and Regulations.

BWTS* Assigned to ships with a BWTS which is Type Approved in accordance with LR’s Type Approval procedures and approved and installed in accordance with LR’s Rules and Regulations.

2.5.7 The following notation associated with the equipment fitted for the abatement of combustion machinery SOx emissions may be assigned as considered appropriate by the Classification Committee:

EGCS This notation will be assigned where the SOx emissions abatement plant has been designed, constructed, arranged, installed and tested in accordance with LR’s Rules and Regulations. Application of the EGCS notation does not infer that the installation will meet the statutory requirements for emissions regulation. This notation is to be supplemented by one of the following associated notations depending on the type of emissions abatement plant that is installed (see Pt 5, Ch 24, 1.2 Class notation and descriptive note 1.2.1 to Pt 5, Ch 24, 1.2 Class notation and descriptive note 1.2.3 for more information):
  • (Open) Open loop wet scrubber installed with no capacity to operate in zero discharge mode;
  • (Closed) Closed loop wet scrubber installed only capable of operating in zero discharge mode;
  • (Hybrid) The installed wet scrubber is able to operate in both open loop and closed loop modes; or
  • (Dry) Dry scrubber installed.

2.5.8 The following notation associated with the equipment fitted for the abatement of combustion machinery NOx emissions may be assigned as considered appropriate by the Classification Committee:

EGCN This notation will be assigned where the NOx emissions abatement plant has been designed, constructed, arranged, installed and tested in accordance with LR’s Rules and Regulations. Application of the EGCN notation does not infer that the installation will meet the statutory requirements for emissions regulation.This notation is to be supplemented by the following associated notation(s) (see Pt 5, Ch 24, 1.2 Class notation and descriptive note 1.2.4 to Pt 5, Ch 24, 1.2 Class notation and descriptive note 1.2.7 for more information):
  • (SCR) Selective catalytic reduction installed.
  • (EGR) Exhaust gas recirculation installed.

2.5.9 The following class notations are associated with hybrid electrical power systems and may be assigned as considered appropriate by the Classification Committee:

Hybrid Power Assigned to ships with an electrical power system utilising a combination of two or more different types of power source or utilising stored electrical energy to satisfy the ship’s main power demand. The system and its component parts are in accordance with the existing applicable requirements of the Rules and the requirements of Pt 6, Ch 2, 24 Hybrid electrical power systems.

Hybrid Power (+) Assigned to ships meeting the requirements for Hybrid Power and the additional optional requirements for Hybrid Power (+) specified within Pt 6, Ch 2, 24 Hybrid electrical power systems. The additional optional requirements aim to provide for enhanced performance of the electrical power system achieved through the consideration of system simulation, system integration and the dependability of the electrical power system during normal or reasonably foreseeable abnormal operation.

2.6 Class notations (refrigerated cargo installations (RMC), controlled atmosphere (CA) systems and carriage of refrigerated containers (CRC))

2.6.1 The following class notations may be assigned as considered appropriate by the Classification Committee, on application from the Owners:

Clasifications RMC This notation will be assigned when a refrigerated cargo installation has been constructed, installed and tested under LR's Special Survey and in accordance with the relevant requirements of the Rules.

Clasifications RMC This notation will be assigned when the arrangements of the refrigerated cargo installation have been found to be equivalent to Rule requirements, and the installation has been tested in accordance with the relevant requirements of the Rules.

This symbol will be assigned to installations considered suitable for the carriage of fruit. It indicates that the following parameters have been assessed and found satisfactory:
  1. The rate of air circulation and the air refreshing arrangements through the refrigerated spaces or chambers, or to containers.

  2. The temperature controls and monitoring arrangements.

  3. The installation's capability to cool down a complete cargo of fruit to its carrying temperature within a specified time. The symbol will also be assigned to fishing vessels that have the refrigerating capacity to freeze down their catch.

Clasifications RMC (LG) This notation will be assigned to a classed liquefied gas carrier or tanker, in which reliquefaction or refrigeration equipment is approved and fitted for cargo temperature and pressure control where the equipment has been constructed, installed and tested in accordance with the relevant requirements of the Rules.

Clasifications RMC (LG) This notation will be assigned to a classed liquefied gas carrier or tanker, in which reliquefaction or refrigeration equipment is fitted for cargo temperature and pressure control, where the equipment has been found equivalent to Rule requirements and tested in accordance with the relevant requirements of the Rules.

Lloyd’s RMC (BC) Assigned to a classed chemical tanker in which refrigeration equipment has been constructed, installed and tested, in accordance with the relevant requirements of the Rules.

Lloyd’s RMC (BC) Assigned to a classed chemical tanker where the equipment has been found equivalent to Rule requirements and tested in accordance with the relevant requirements of the Rules.

TC Assigned to a classed chemical tanker where the temperature control systems have been found equivalent to Rule requirements and tested in accordance with the relevant requirements of the Rules.

2.6.2 The following class notations are associated with controlled atmospheres and may be assigned as considered appropriate by the Classification Committee, on application from Owners, see also Pt 7, Ch 1 Controlled Atmosphere Systems:

(CA) This notation may be assigned when a ship is fitted with arrangements for maintaining airtightness in CA zones and for the ready connection to a gas system in accordance with the relevant requirements of the Rules.
CA (%O2, %CO2) This notation may be assigned when a ship is provided with a CA system which will achieve and maintain specified ranges of oxygen and carbon dioxide levels in accordance with the relevant requirements of the Rules.
RH This notation may be assigned when a ship can maintain a specified relative humidity in the CA zones.
RPA Assigned to ships where the Refrigeration Machinery for Provision Stores and Air-conditioning comply with the applicable requirements of Pt 7, Ch 15 Refrigeration Systems and Equipment Serving Provision Stores and Air-Conditioning Installations.

Before assignment of any of the above notations it is a prerequisite that the refrigeration installation is assigned an RMC class notation.

2.6.3 The following class notation is associated with the carriage of refrigerated cargo containers and may be assigned as considered appropriate by the Classification Committee, on application from Owners, see also Pt 7, Ch 10 Carriage of Refrigerated Containers:

CRC This notation may be assigned when a ship is provided with a ventilation system which is approved, installed and tested in accordance with the relevant requirements of the Rules.

2.6.4 The class notation assigned will additionally specify the temperature conditions and other relevant characteristics for which the equipment has been approved, see Pt 6, Ch 3 Refrigerated Cargo Installations.

2.6.5 The class notation assigned will be maintained as long as the installation is found, at the prescribed Periodical Surveys, to be in a fit and efficient condition, and in accordance with the requirements of the Rules.

2.6.6 The Classification Committee will give consideration to ships engaged on voyages of short duration, to installations of small capacity, or to other special circumstances. In such cases the class may include a service limitation or other restriction.

2.6.7 Refrigerating installations designed to supply refrigerated air to insulated containers in ships' holds aboard container ships, are eligible for classification. The installation is to include the refrigerating machinery, supply and return air ducting, and the flexible couplings between containers and the duct system. Where the arrangements are such that cell air conditioning is essential to the carriage of the containers, the air conditioning equipment and/or insulation of the hold, deckheads, sides and tank tops are to be included in the classification.

2.6.8 Other methods of carrying refrigerated cargoes in containers aboard container ships will be considered for classification on application.

2.7 Class notations (Environmental Protection)

2.7.1 The following class notations are associated with the design and operation of a ship and may be assigned as considered appropriate by the Classification Committee, on application from the Owners:

ABN( ) This notation will be assigned where a vessel has had its airborne noise measured and certified in accordance with LR’s ShipRight Additional Design and Construction Procedure for the determination of airborne noise emissions from marine vessels, and the sound power and sound pressure are found to be less than the assessment criterial limits it contains. The parentheses are to contain the characters associated with the most stringent assessment criteria limits that the airborne noise of the vessel satisfies.
ECO This notation will be assigned when a ship is designed and operated in accordance with the relevant requirements of the Rules.
ECO(TOC) This notation will be assigned when the environmental protection arrangements are in accordance with the requirements of another recognised classification society and are essentially equivalent to Rule requirements and the ship is operated in accordance with the relevant requirements of the Rules.
UWN-M This notation will be assigned where a vessel has had its underwater radiated noise measured and certified in accordance with LR’s ShipRight Procedure Additional Design and Construction Procedure for the Determination of a Vessel’s Underwater Radiated Noise.
UWN-L( )

This notation will be assigned where a vessel has had its underwater radiated noise measured and certified in accordance with LR’s ShipRight Procedure Additional Design and Construction Procedure for the Determination of a Vessel’s Underwater Radiated Noise and the profile of the underwater radiated noise curve(s) are found to be less than the limits contained in the ShipRight Procedure. The parentheses are to contain the limit set in accordance with the ShipRight Procedure and listed therein.

2.8 Descriptive notes

2.8.1 In addition to any class notations, an appropriate descriptive note may be entered in column 6 of the Register Book indicating the type of ship in greater detail than is contained in the class notation, and/or providing additional information about the ship's design and construction. This descriptive note is not an LR class notation and is provided solely for information.

2.8.2  ShipRight(). Where one or more of LR’s ShipRight procedures for the following have been satisfactorily applied, then a descriptive note showing the associated characters of the procedure(s) within brackets will, at the Owner’s request, be entered in column 6 of the Register Book, preceded by the word ShipRight, e.g. ShipRight(IHM, SERS). The requirements pertaining to these descriptive notes and the ShipRight procedures are given in Pt 3, Ch 16 ShipRight Procedures for the Design, Construction and Lifetime Care of Ships and Pt 5, Ch 21 Requirements for Condition Monitoring and Condition-Based Maintenance Systems, or directly within the relevant ShipRight Procedure document.

AM() This ShipRight descriptive note (Alarm Management) will be assigned where the ship’s alarm management system complies with the relevant ShipRight procedure.
For ships for the carriage of liquefied gases in bulk the characters of the procedure are AM(C, LG) where:
  • C indicates Cargo Alarms.
  • LG indicates Liquified Gas.
BWMP() This ShipRight descriptive note (Ballast Water Management Plan) will be assigned, when the requirements in accordance with the relevant ShipRight procedures have been complied with. The descriptive note BWMP() with the extension of one or more of the following associated supplementary characters shown in brackets, detailing the method(s) used, may be assigned:
  • S sequential method;
  • F flow through method;
  • D dilution method;
  • T treatment method.
DIST() This ShipRight descriptive note (Machinery suitable for operation on Distillate Fuels) will be assigned when specified machinery items are suitable for operation on distillate fuels, in accordance with the relevant ShipRight procedures. The DIST() descriptive note with the extension of one or more of the following associated supplementary characters shown in brackets, detailing the specified machinery items, may be assigned:
  • M main engine(s);
  • AB auxiliary engines and boiler;
  • I incinerator;
  • IG inert gas generator.
E This ShipRight descriptive note (Evidence) will be assigned, where evidence exists that supporting calculations have been performed in accordance with hull structural finite element and fatigue analysis procedures of a recognised classification society. This descriptive note can be assigned to vessels transferring class or to new builds where the design has been appraised by another recognised classification society.
ES() This ShipRight descriptive note (Enhanced Scantlings) will be assigned, where scantlings in excess of the approved Rule minimum are fitted at defined locations in accordance with the relevant ShipRight procedures. The added thickness measurement in mm is to be shown with a description of the location(s) in brackets e.g. ShipRight(ES(+1 Strength Deck, +2 Bottom Shell)).
HCD1() This ShipRight descriptive note (Human-Centred Design Level 1) will be assigned when the development and operation of specified ship system(s) has been carried out in accordance with the process for ‘Level 1 – Reactive’ detailed in the ShipRight procedure for Human-centred Design. The names of the systems which meet the requirements will be listed as a suffix to the character, e.g. HCD1(mooring area, ECDIS).
IHM This ShipRight descriptive note (Inventory of Hazardous Materials) will be assigned when the requirements in accordance with the relevant ShipRight procedures have been complied with.
MPMS() This ShipRight descriptive note (Machinery Planned Maintenance Scheme) will be assigned where an Owner operates, as part of the Continuous Survey Machinery (CSM) cycle, a Machinery Planned Maintenance Scheme which is approved in accordance with LR’s ShipRight Procedures for Machinery Planned Maintenance and Condition Monitoring. The descriptive note will indicate that procedures and documentation are in place to control and record the inspection and maintenance routines of all machinery and equipment in the ship.
  • CM This ShipRight descriptive note (Condition Monitoring) will be assigned where an Owner operates, as part of the Continuous Survey Machinery (CSM) cycle, a Machinery Planned Maintenance Scheme which uses monitoring techniques and equipment are used to record the condition against agreed acceptable limits and the scheme is approved in accordance with LR’s ShipRight Procedures for Machinery Planned Maintenance and Condition Monitoring. The descriptive note will indicate that equipment, procedures and documentation are in place to monitor, control and record the physical and operational condition of the equipment on the ship and control the maintenance routines accordingly. For the design and installation of machinery condition monitoring systems which form part of a Machinery Planned Maintenance Scheme approved by LR for the assignment of the descriptive note, the requirements of Pt 5, Ch 21 Requirements for Condition Monitoring and Condition-Based Maintenance Systems are applicable.
  • PT This ShipRight descriptive note (Predictive Techniques) will be assigned where an Owner operates, as part of the Continuous Survey of Machinery (CSM) cycle, a Machinery Planned Maintenance Scheme which uses the output from machine learning and complex algorithms to determine acceptability for continued service and maintenance requirements and the scheme is approved in accordance with LR’s ShipRight Procedures for Machinery Planned Maintenance and Condition Monitoring. The descriptive note will indicate that equipment, procedures and documentation are in place to monitor, control and review the output from machinery maintenance systems using Predictive Techniques. The requirements of Pt 5, Ch 21 Requirements for Condition Monitoring and Condition-Based Maintenance Systems are applicable.
  • RBM This ShipRight descriptive note (Risk Based Maintenance) will be assigned where an Owner operates, as part of the Continuous Survey Machinery (CSM) cycle, a Machinery Planned Maintenance Scheme based on the use of Risk Based Maintenance (RBM) which is approved in accordance with LR’s ShipRight Procedures for Machinery Planned Maintenance and Condition Monitoring. The descriptive note will indicate that procedures and documentation are in place to control and record the inspection and maintenance routines of machinery and equipment based on the output from a Risk Based study. The Scheme is to be based on a risk assessment and an RBM In-Service Inspection Plan, both approved by LR.
  • RCM This ShipRight descriptive note (Reliability Centred Maintenance) will be assigned where an Owner operates, as part of the Continuous Survey Machinery (CSM) cycle, Machinery Planned Maintenance Scheme based on the use of Reliability Centred Maintenance which is approved in accordance with LR’s ShipRight Procedures for Machinery Planned Maintenance and Condition Monitoring. The descriptive note will indicate that procedures and documentation are in place to control and record the inspection and maintenance routines of all machinery and equipment in the ship, and that they are based on acceptable and applicable methodology.
PCWBT() This ShipRight descriptive note (Protection Coatings in Water Ballast Tanks) will be assigned, to indicate that all sea-water ballast spaces having boundaries formed by the hull envelope have a corrosion protection coating applied, and that the coating remains efficient and is maintained in good condition. The month and year that the coating is approved is to be appended to the descriptive note within brackets.
SCM This ShipRight descriptive note (Screwshaft Condition Monitoring) will be assigned where an Owner adopts the requirements for monitoring of the screwshaft. The descriptive note will indicate that equipment and procedures are in place to determine the physical and operational condition of that equipment.
SEA() This descriptive note (Ship Event Analysis) will be assigned, where hull surveillance systems for monitoring of the ship’s hull girder stresses and motions have been fitted and are in compliance with the relevant ShipRight procedures. The ShipRight descriptive note is to be appended by HSS followed by the number of strain gauges fitted shown in brackets. In addition the extension of one or more of the following associated supplementary characters may be shown e.g. ShipRight(SEA(HSS-2, VDR)):
  • L The display of the relevant information in the cargo control area;
  • M The display and recording of the ship’s motion;
  • N The facility to display and record navigational information;
  • VDR An interface with the ship's voyage data recorder system to enable the recording of hull stress, ship motion and hull pressure information.
SEA ICE This ShipRight descriptive note (Ship Event Analysis Ice) will be assigned when the ship has been provided with a hull surveillance system that can display and record local ice load induced stresses from a series of strain gauges in the bow region.
SERS This ShipRight descriptive note (Ship Emergency Response Service) will be assigned when a Ship is registered with LR’s Ship Emergency Response Service.
ShaftRight() This ShipRight descriptive note will be assigned when the main propulsion shafting alignment has been carried out in accordance with ShipRight Procedure ShaftRight: Main Propulsion Shafting Alignment Procedure, which LR considers to be best practice during design, construction and trials. The ShaftRight() descriptive note with the extension of one or more of the following associated supplementary characters shown in brackets, may be assigned:
  • E Existing design. Applicable to vessels having main propulsion shafting and hull arrangements which have been previously implemented and, for which, proven satisfactory service experience is demonstrated;
  • N New design. Applicable to a new main propulsion shafting arrangement within a new, or previously implemented, hull design.
SRtP This ShipRight descriptive note (Safe Return to Port and Orderly Evacuation) is to be applied where the design appraisal and survey of the vessel has been performed in accordance with the relevant ShipRight procedures for vessels required to comply with Safe Return to Port and Orderly Evacuation.
TCM This ShipRight descriptive note (Main Steam Turbine Condition Monitoring) will be assigned where an Owner adopts the requirements for monitoring of the main steam turbine. The descriptive note will indicate that equipment and procedures are in place to determine the physical and operational condition of that equipment. Further information is provided in the LR document ShipRight Procedure Machinery Planned Maintenance and Condition Monitoring.
ThCM Thruster Condition Monitoring. This ShipRight descriptive note (Thruster Condition Monitoring) will be assigned where an Owner adopts the requirements for monitoring of selected Thrusters and/or Podded Propulsors. The descriptive note will indicate that equipment and procedures are in place to determine the physical and operational condition of that equipment. Further information is provided in the LR document ShipRight Procedure Machinery Planned Maintenance and Condition Monitoring.
Note Not applicable where a single thruster, or podded propulsor, is solely responsible for the propulsion and/or steering of the vessel.
VECS This ShipRight descriptive note (Vapour Emission Control System) will be assigned to a ship that has a vapour emission control system fitted which has been designed and constructed in accordance with the requirements of USCG 46, CFR 39 or the IMO Standards for Vapour Emission Control Systems (MSC Circular 585).
VECS-L This ShipRight descriptive note (Vapour Emission Control System – Lightering) will be assigned to a ship that has a vapour emission control system that complies with the requirements for the VECS Descriptive Note and which has also been designed and constructed to meet the requirements for vapour balancing in accordance with USCG 46, CFR 39.40 for service vessels. If a ship has been assigned the ECO notation then it will not be eligible for the VECS-L Descriptive Note. Instead, VECS for lightering will be referenced in the ECO notation, i.e. ECO(VECS-L).

2.8.3 Where an approved loading instrument is provided as an Owner's requirement, a descriptive note LI may be entered in column 6 of the Register Book, see also Pt 1, Ch 2, 2.3 Class notations (hull) 2.3.16.

2.8.4 Where container securing arrangements are designed and constructed in accordance with Pt 3, Ch 14 Cargo Securing Arrangements, but where the Initial and Periodical Survey requirements for loose fittings are not requested, the ship will be eligible to be assigned the descriptive note CSA (container securing arrangement) and for an entry to be made in column 6 of the Register Book.

2.8.5  EDD. Vessel is eligible for the Owner/Operator to apply to the Flag Administration for the vessel to be placed on a pilot Extended Dry-Docking regime. The relevant Flag Administration may elect to impose requirements additional to those defined as per this descriptive note. Vessels are to comply with the LR Guidance notes on Extended Dry- Dockings.

2.8.6  STV. Where a sailing vessel is used for the offshore training of cadets or trainee seamen, a sailing training vessel STV descriptive note may be entered in column 6 of the Register Book.

2.8.7 The following descriptive note is associated with low flashpoint fuelled vessels and may be assigned as considered appropriate by the Classification Committee:

GR(yy,z) Ships complying with particular aspects of these Rules may be eligible for assignment of LR’s gas or other low-flashpoint fuel Gas Ready descriptive note, GR(yy,z) where ‘yy’ identifies the type of fuel (consistent with the LFPF notation) and ‘z’ identifies the particular aspects which have been approved or approved and installed. This descriptive note is not an LR class notation and is provided solely for information. If a ship has been assigned the LFPF notation then it will not be eligible for the GR descriptive note for the same type of fuel.

With reference to ‘z’, the following identifiers are used:

A Approval in Principle. The design of the fuel system has been approved in principle.
S Structural Reinforcement Installed. Enhanced structural reinforcement using appropriate materials to support the proposed fuel storage tank has been installed in accordance with an approved design and surveyed accordingly.
T Tank Installed. The fuel storage tank, all tank valves including the tank master isolation valve, fuel venting arrangements and, where applicable, the fuel storage hold space, structural fire protection and ventilation arrangements for under deck tank locations have been built under survey and installed in accordance with an approved design and surveyed accordingly.
P Piping Installed. Piping and equipment associated with the fuel system, e.g. pipes, pumps, valves, processing equipment etc. from the bunker manifold to the fuel consumers, bunkering arrangements and associated access arrangements including structural fire protection as applicable, have been installed in accordance with an approved design and surveyed accordingly.
  E Equipment and Machinery Installed. Equipment and machinery which is intended to be supplied by the fuel system has been installed in accordance with the approved design and surveyed accordingly. Additional letters, in brackets, identify the items of equipment or machinery installed:

M - Main engine(s)

A - Auxiliary engine(s)

B – Boiler(s)

I – Incinerator(s)

T – Gas Turbine(s)

F – Fuel cell generator(s)

 

2.8.8 EGCS-R(). Assigned to ships with the extension of one or more of the following associated characters shown in brackets, detailing the aspects of design and construction that are prepared for installation of SOx emissions abatement plant for combustion machinery in accordance with LR’s Rules and Regulations in force on the date of ‘contract for construction’ (see Pt 5, Ch 24, 1.2 Class notation and descriptive note 1.2.1 to Pt 5, Ch 24, 1.2 Class notation and descriptive note 1.2.3 for more information):

A Preliminary assessment of the proposed SOx emissions abatement plant including its arrangement on board has been completed satisfactorily;

S Enhanced structural reinforcement and structural modifications necessary for the function of the proposed SOx emissions abatement plant have been fitted under survey;

T The relevant tank(s) needed for operation of the proposed SOx emissions abatement plant (e.g. chemical and/or residue storage tanks as applicable) have been installed under survey.

2.8.9 EGCN-R(). Assigned to ships with the extension of one or more of the following associated characters shown in brackets, detailing the aspects of design and construction that are prepared for installation of NOx emissions abatement plant for combustion machinery in accordance with LR’s Rules and Regulations in force on the date of ‘contract for construction’ (see Pt 5, Ch 24, 1.2 Class notation and descriptive note 1.2.4 to Pt 5, Ch 24, 1.2 Class notation and descriptive note 1.2.6 for more information):

A Preliminary assessment of the proposed NOx emissions abatement plant including its arrangement on board has been completed satisfactorily;

S Enhanced structural reinforcement and structural modifications necessary for the function of the proposed NOx emissions abatement plant have been fitted under survey;

T The relevant tank(s) needed for operation of the proposed NOx emissions abatement plant (e.g. chemical tanks) have been installed under survey in accordance with approved design.

2.8.10 OHCF() This descriptive note will be assigned to general cargo ships where the class notation Hatch Covers may be omitted in Hold (No(s) …) where the longitudinal strength has been assessed using flooded strength limits, see Pt 3, Ch 9, 10.3 Longitudinal strength 10.3.3. The wave height limitation for loading conditions where hatch covers are omitted is to be appended to the descriptive note within brackets.

2.8.11 Single pass loading This descriptive note may be assigned to ore carriers, where the maximum permissible cargo intake per cargo hold may be loaded in a single loading pour, see Pt 4, Ch 11, 13 Single pass loading.

2.8.12 READY(). When satisfactory preparation has been made at the time of completion and delivery or refit of the vessel for a structure, a system or equipment which is subject to classification, then this descriptive note, showing the associated classification characters within brackets will, at the Owner’s request, be entered in the Register Book preceded by the word READY, e.g. READY(RIGGING).

If the asset is READY() for multiple notations the descriptive note will appear as READY(notation 1, notation 2).

Satisfactory preparation includes but is not limited to:

  • Clear and comprehensive definition of the intended structure, system or equipment in line with classification requirements.
  • The interface boundary delimiting the physical and operational boundary is clearly defined and sets out the components that are omitted during construction.
  • A list of interface requirements even though these are not typically part of the requirements for classification. These are to be accompanied by technical solutions or reference to design features that show how each of the interface requirements is met. The interface location and requirements are to be jointly developed by the Client and LR.
  • Interface requirements may be quantitative or qualitative. Suitable safety criteria are to be defined.
  • The design of the asset fully incorporates the intended structure, system or equipment. This is to be verified during appraisal.
  • As far as practicable, the fitting of the omitted structure, system or equipment is not to depend on the removal of other structures, systems or equipment but should only depend on the addition of the omitted structure, system or equipment.

Each of the design documents which are required for classification is assessed as if the structure, system or component is fitted. If details of the system are unknown at the time of application for the descriptive note, design constraints may, on occasion, be confirmed by an Approvall in Principle (AiP). This course of action will be captured in the descriptive note in the following manner: READY(NOTATION(A)) where A indicates the AiP.

Additional interface documents are assessed with particular attention to the practicality and feasibility of the boundary definition.

Construction is carried out as per appraised plans omitting the structure, system or equipment set out by the interface boundary.

The READY() descriptive note is awarded based on the documented verification of the above requirements. Appraisal and survey by LR will be carried out as far as practicable for the interface arrangements and, if applicable, the partially installed system.

Notations are included in the list of those eligible for the READY() descriptive note at the discretion of LR.

2.9 Application notes

2.9.1  Propelling and essential auxiliary machinery includes machinery, equipment and systems installed for the ship to be under seagoing conditions and that are necessary for the following:

  1. Maintaining the watertight and weathertight integrity of the hull and spaces within the hull.

  2. The safety of the ship, machinery and personnel on board.

  3. The functioning and dependability of propulsion, steering and electrical systems.

  4. The operation and functioning of control engineering systems for the monitoring and safety of propulsion and steering systems.

  5. The operation and functioning of emergency machinery and equipment.

2.9.2  Manufacturer's certificate for assignment of the LMC notation. Acceptance of the manufacturer's certificate for items of machinery for propulsion (including propulsion gearing with single input/output arrangements) and for electrical power generation and for other auxiliary machinery for essential services is subject to the following:

  1. The ship is a cargo ship of less than 500 gross tonnage or is a ship of 500 gross tonnage or greater and is not required to comply with international conventions applicable to a ship with unrestricted service.

  2. Propulsion power is provided by engines or gas turbines which have been type approved in accordance with LR requirements for marine application.

  3. Electrical power is provided by generators driven by engines or gas turbines which have been type approved in accordance with LR requirements for marine application.

  4. The design and manufacture standards for all machinery and associated engineering systems are the applicable LR Rules.

  5. The machinery and equipment is manufactured under a recognised quality control system.

  6. Propellers, propulsion shafting and multiple input/output gearboxes are not included within the scope of propulsion arrangements for acceptance of a manufacturer's certificate.

2.9.3  Manufacturer's certificate for assignment of the MCH notation. Acceptance of the manufacturer's certificate for propelling and essential auxiliary machinery is subject to the following:

  1. The ship is a cargo ship of less than 500 gross tonnage or is a ship of 500 gross tonnage or greater and is not required to comply with the international conventions applicable to a ship with unrestricted service.

  2. Propulsion power is provided by engines or gas turbines which have been type approved in accordance with LR requirements for marine application.

  3. Electrical power is provided by generators driven by engines or gas turbines which have been type approved in accordance with LR requirements for marine application.

  4. The power of any prime mover is less than 2,250 kW and the cylinder bore or any engine is not greater than 300 mm.

  5. The design and manufacture standards for machinery and associated systems are the applicable LR Rules or other marine standards acceptable to LR.

  6. The machinery and equipment is manufactured under a recognised quality control system in accordance with the requirements of Pt 5, Ch 1, 1.3 Alternative approach for product assurance.

  7. Individual components manufactured under Pt 1, Ch 2, 2.9 Application notes 2.9.3.(f) are to be delivered with a manufacturer’s statement confirming that the scantlings comply with the applicable LR Rule requirements.


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