Section 23 Notations and Descriptive Notes

23.1 Notations

Table 3.23.1 Type Notations

Type Notations:
Floating offshore installations: Floating Production Unit Floating Production, Storage and Offloading Unit Floating Storage Offloading Unit Sea water Desalination Unit	Mobile offshore units: Accommodation unit Mobile offshore drilling unit Crane unit Diving support unit Support unit Multi-purpose support unit Pipe laying unit Drill ship Fire-fighting unit 1 Fire-fighting unit 2 Fire-fighting unit 3 MainWIND Liftboat	Buoys and single point moorings: Mooring buoy Single-point mooring buoy Tanker loading terminal Mooring tower Articulated mooring tower
Character symbols:
Symbol	Description	Further information
OI	For a unit operating at a fixed location.	Pt 1, Ch 2, 1.1 Application 1.1.2, Pt 1, Ch 2, 1.2 Floating offshore installations at a fixed location 1.2.1 . Pt 10, Ch 1, 1.2 Definitions 1.2.5 and Pt 10, Ch 1, 1.3 Application of transit conditions 1.3.1.
OU	For a mobile unit transiting between operational locations.	Pt 1, Ch 2, 1.1 Application 1.1.2, Pt 1, Ch 2, 1.3 Mobile offshore units 1.3.1.
	Assigned to units built to LR’s rules.
	Assigned to units built to other IACS society’s rules and then classed with LR.
	Assigned to units built to LR’s class but using plans from another IACS society.
100	Assigned to units operating at sea.
A	Assigned to units which will be maintained in good and efficient condition.
1	Assigned to units either having: a) anchoring and/or mooring equipment in good and efficient condition b) anchoring and/or mooring equipment in good and efficient condition suitable for a particular service c) Dynamic positioning system replacing the need for anchoring and/or mooring equipment.
(1)	Assigned to self propelled floating offshore installations which are disconnectable in order to avoid severe storms or hazards.	Pt 1, Ch 2, 3.8 Notice of surveys 3.8.2 Pt 1, Ch 3, 3.2 Intermediate Surveys 3.2.6 and Pt 1, Ch 3, 5.3 Examination and testing 5.3.31 Pt 4, Ch 9 Anchoring and Towing Equipment Pt 10, Ch 1, 1.3 Application of transit conditions 1.3.2
T	Assigned to floating offshore installations which have anchoring, mooring or linking equipment in good and efficient condition	Pt 3, Ch 10 Positional Mooring Systems
N	Assigned to units which do not require anchoring and mooring equipment to be fitted	Pt 4, Ch 9 Anchoring and Towing Equipment
* For classification purposes 1 and either T or N are to be assigned to a unit.
Class Notations:
Notation:	Description	Further information
OMC	Assigned to non-propelled units whose remaining machinery has been built to LR’s Rules
OMC	Assigned to non-propelled units whose remaining machinery has been built to other IACS society’s rules and then classed with LR.
OMC	Assigned to non-propelled units where some remaining machinery has not been built to LR’s Rules.
LMC	Assigned to propelled units whose machinery has been built to LR’s Rules.
LMC	Assigned to propelled units whose machinery has been built to other IACS society’s rules and then classed with LR.
LMC	Assigned to propelled units where some remaining machinery has not been built to LR’s Rules.
IGS	Assigned to units having the facility to store crude oil and are fitted with an approved system for producing gas for inerting the crude oil storage tanks.	Pt 1, Ch 3, 18 Inert gas systems
UMS	Assigned where the unit can operate with unattended machinery spaces.	Pt 6, Ch 1, 4 Unattended machinery space(s) – UMS notation Pt 6, Ch 1, 7.2 Unattended machinery space operation – UMS notation Pt 7, Ch 1 Safety and Communication Systems Pt 6, Ch 1, 4 Unattended machinery space(s) - UMS notation – Rules and Regulations for the Classification of Ships, July 2022
CCS	Assigned where the unit can operate machinery from a centralised control system.	Pt 6, Ch 1, 5 Machinery operated from a centralised control station – CCS notation Pt 6, Ch 1, 7.3 Operation from a centralised control station – CCS notation Pt 7, Ch 1 Safety and Communication Systems Pt 6, Ch 1, 5 Machinery operated from a centralised control station - CCS notation – Rules and Regulations for the Classification of Ships, July 2022
ICC	Assigned where the unit’s operational functions have an integrated computer control	Pt 6, Ch 1, 6 Integrated computer control – ICC notation Pt 6, Ch 1, 6 Integrated computer control - ICC notation– Rules and Regulations for the Classification of Ships, July 2022
IP	Assigned to units where the machinery arrangements and control systems necessary for operating essential machinery is from a centralised control system.	Pt 5, Ch 18 Integrated Propulsion Systems - Rules and Regulations for the Classification of Ships, July 2022
Lloyd’s RMC(LG)	Mandatory to units when reliquefaction and/or refrigeration equipment is fitted	Pt 11, Ch 1, 1.6 Class notations and descriptive notes 1.6.3
CSR	Assigned to floating offshore installations having previously been built as double hull oil tankers to IACS’s Common Structural Rules	Generally indicates a hull fatigue life of 25 years from date of build.
CAC1, 2 or 3	Crew Accommodation Comfort. Assigned to units which have crew accommodation and work areas compliant with standards for noise and vibration levels defined in the Rules and Regulations for the Classification of Ships, July 2022.	Pt 7, Ch 12 Passenger and Crew Accommodation Comfort of the Rules and Regulations for the Classification of Ships, July 2022 Following the CAC notation, the numeral 1, 2 or 3 will indicate the acceptance criteria to which the noise and vibration levels have been assessed.
FWS	Fresh Water System Assigned to units which have an installed fresh water system (including sea water desalination plant, if fitted) which complies with the Rules.	Pt 5, Ch 26 Fresh Water Systems
LFPF (GF, NG or EG or LP or HG or ML)	Low flashpoint fuel. Assigned to units where the main propelling and/or auxiliary machinery is designed to operate on a low flashpoint fuel, or a combination of low flashpoint fuel and standard marine oil fuel, in accordance with the LR’s Rules and Regulations for the Classification of Ships using Gases or other Low-flashpoint Fuels, July 2022. The low flashpoint fuel (or fuels) that the unit is designed to use is (are) indicated in the notation using a two letter identifier.	Rules and Regulations for the Classification of Ships using Gases or other Low-flashpoint Fuels, July 2022
PLS	Pipe Laying System. Optional notation assigned to mobile offshore units which are fitted with a pipe-laying system that is included in class.	Pt 3, Ch 17 Pipe-laying Units
Restrictions:	Meaning:
Service area	An additional notation assigned indicating the unit may only operate at one particular point or area.
Special features:
Notation	Description	*See also*
PPF	Process plant facility. Assigned to floating offshore installations where facilities are built to LR’s Rules or a recognised code and standard accepted by LR.	Pt 1, Ch 2, 1.2 Floating offshore installations at a fixed location 1.2.1 Pt 1, Ch 3, 1.6 Planned survey programme 1.6.3 , Pt 1, Ch 3, 2.5 Production and oil storage units 2.5.5 , Pt 1, Ch 3, 5.3 Examination and testing 5.3.27 , Pt 1, Ch 3, 14 Process plant facility , Pt 1, Ch 3, 19.2 Hull and equipment and Pt 1, Ch 3, 19.3 Machinery 19.3.2. Pt 3, Ch 3, 1.2 Class notations 1.2.5 and Pt 3, Ch 3, 1.2 Class notations 1.2.6 Pt 3, Ch 8 Process Plant Facility Pt 4, Ch 4, 1.10 Topside structure 1.10.4 Pt 10, Ch 1, 1.1 Application 1.1.10
OIWS	Offshore in-water survey. Assigned when a unit does not intend to drydock during its normal service life.	Pt 1, Ch 3, 4 Bottom Surveys – In dry dock and In-water – Hull and machinery requirements Pt 3, Ch 1 General Requirements for Offshore Units Pt 4, Ch 1, 4.5 Plans to be supplied to the unit 4.5.2 Pt 4, Ch 10, 2.1 General 2.1.2 Pt 8, Ch 1 General Requirements for Corrosion Control
LI	Loading instrument. Generally assigned to surface type units. Mandatory for such units over 65 m ensuring the Master has information that unacceptable stresses are not being placed on the unit whilst loading or off-loading.	Pt 3, Ch 4 Longitudinal Strength - Rules and Regulations for the Classification of Ships, July 2022
DP (CM)	Assigned where the unit is fitted with dynamic positioning arrangements and is fitted with centralised remote controls for position keeping	Pt 3, Ch 9 Dynamic Positioning Systems Pt 7, Ch 4, 2 Class notation DP(CM) – Rules and Regulations for the Classification of Ships, July 2022
DP (AM)	Assigned where the unit is fitted with dynamic positioning arrangements and is fitted with automatic main and manual standby controls for position keeping	Pt 3, Ch 9 Dynamic Positioning Systems Pt 6, Ch 2, 15.3 Thruster systems for dynamic positioning Pt 7, Ch 4, 3 Class notation DP(AM) – Rules and Regulations for the Classification of Ships, July 2022
DP (AA)	Assigned where the unit is fitted with dynamic positioning arrangements and is fitted with automatic main and automatic standby controls for position keeping	Pt 3, Ch 9 Dynamic Positioning Systems Pt 7, Ch 4, 4 Class notation DP(AA) – Rules and Regulations for the Classification of Ships, July 2022
DP (AAA)	Assigned where the unit is fitted with dynamic positioning arrangements and is fitted with automatic main and automatic standby controls together with an additional/emergency automatic control unit for position keeping	Pt 3, Ch 9 Dynamic Positioning Systems Pt 7, Ch 4, 5 Class notation DP(AAA) – Rules and Regulations for the Classification of Ships, July 2022
PCR	Performance Capability Rating. Additional to a DP notation. The rating indicates the calculated percentage of time that a unit is capable of holding position under a standard set of conditions	Pt 3, Ch 9 Dynamic Positioning Systems Pt 7, Ch 4, 6 Performance Capability Rating (PCR) – Rules and Regulations for the Classification of Ships, July 2022
ECO	Assigned when the unit will implement and maintain operational pollution measures	Pt 7, Ch 11 Arrangements and Equipment for Environmental Protection (ECO Class Notation) – Rules and Regulations for the Classification of Ships, July 2022
ECO (TOC)	Assigned when the unit, transferring from another IACS Society, will implement and maintain operational pollution measures	Pt 7, Ch 11 Arrangements and Equipment for Environmental Protection (ECO Class Notation) – Rules and Regulations for the Classification of Ships, July 2022
CAV	Assigned when the unit is classed on the basis that LR has accepted performance standards as the basis for design and construction and will be subject to verification by LR once in service in accordance with local regulations where the unit is based.	Part 1 Chapter 2 Section 1.2.3 Pt 1, Ch 5 Guidelines for Classification using Risk Assessment Techniques to Determine Performance Standards
DRILL	Drilling plant facility. Assigned where facilities have are constructed, installed and tested by LR or a recognised code and standard accepted by LR.	Pt 1, Ch 3, 1.6 Planned survey programme 1.6.3, Pt 1, Ch 3, 2.7 Drilling units 2.7.1, Pt 1, Ch 3, 5.3 Examination and testing 5.3.26, Pt 1, Ch 3, 13 Drilling plant facility Pt 1, Ch 3, 19.2 Hull and equipment, Pt 1, Ch 3, 19.3 Machinery 19.3.2 Pt 3, Ch 2 Drilling Units Pt 3, Ch 3, 1.2 Class notations 1.2.8 & Pt 3, Ch 3, 1.2 Class notations 1.2.9 Pt 3, Ch 7 Drilling Plant Facility Pt 4, Ch 4, 1.10 Topside structure 1.10.5 Pt 4, Ch 6, 1.1 General 1.1.14 Pt 10, Ch 1, 1.1 Application 1.1.11
ShipRight SDA, RBA, FDA or CM	A notation indicating one or more of LR’s ShipRight procedures have been satisfactorily followed.	ShipRight procedures Pt 4, Ch 1, 4.5 Plans to be supplied to the unit 4.5.3 Pt 10, Ch 1, 5.1 General 5.1.4, Pt 10, Ch 1, 6.1 General 6.1.4 and Pt 10, Ch 1, 6.1 General 6.1.6
DROPS	Assigned where risks to personnel are continuously addressed in so far as they affect the objectives of classification.	Pt 3, Ch 1, 8 Risks to personnel from dropped objects
PRS	Product riser system. Assigned where a unit is connected to a product riser complying with recognised codes and standards accepted by LR	Pt 1, Ch 3, 1.6 Planned survey programme 1.6.6, Pt 1, Ch 3, 15 Riser systems, Pt 3, Ch 8, 9 Riser systems Pt 3, Ch 12 Riser Systems Pt 3, Ch 13, 1.4 Class notations 1.4.6and Pt 3, Ch 13, 2.3 Subsea buoyant vessels 2.3.1 Pt 7, Ch 1, 1.1 General 1.1.11 and Pt 7, Ch 1, 9 Riser systems
Ice Class	Assigned where a unit is strengthened for specific ice conditions. Supplementary notations are provided.	Pt 3, Ch 6 Units for Transit and Operation in Ice Pt 4, Ch 10, 1.3 Navigation in ice
ISIS	Integrated Software Intensive System. Assigned when the integrated computer system controls a number of services.	Pt 3, Ch 15 Integrated Software Intensive Systems
with water spray	Assigned to a unit intended for fire-fighting operations and is fitted with a system which will provide an effective cooling spray of water.	Pt 3, Ch 5 Fire-fighting Units
LA	Mandatory lifting appliance(s). Assigned where the lifting appliance(s) is considered to be an essential feature.	Pt 3, Ch 4, 1.2 Class notations 1.2.7 Pt 3, Ch 11 Lifting Appliances and Support Arrangements Pt 3, Ch 16, 1.4 Class notations 1.4.6 Code for Lifting Appliances in a Marine Environment, July 2022
	Mandatory notation assigned where one or more lifting appliances are considered to be an essential feature of the vessel and have 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 4, 1.2 Class notations 1.2.7 Pt 3, Ch 11 Lifting Appliances and Support Arrangements Pt 3, Ch 16, 1.4 Class notations 1.4.6 Code for Lifting Appliances in a Marine Environment, July 2022
OC	Crane(s). Assigned where the unit’s main deck crane(s) are included at the Owner’s request	Pt 3, Ch 11 Lifting Appliances and Support Arrangements Code for Lifting Appliances in a Marine Environment, July 2022
PL	Personnel lift(s). Assigned where personnel lift(s) are included at the Owner’s request	Pt 3, Ch 11 Lifting Appliances and Support Arrangements Code for Lifting Appliances in a Marine Environment, July 2022
PM	Positional mooring system. Assigned to mobile offshore units whose station-keeping complies with the Rules.	Pt 1, Ch 3, 1.6 Planned survey programme 1.6.3, Pt 1, Ch 3, 4.2 Bottom Surveys in dry dock 4.2.10 Pt 1, Ch 3, 5.5 Positional mooring systems Pt 3, Ch 10 Positional Mooring Systems
PMC	Positional mooring system for mooring in close proximity to other vessels or units. Assigned to mobile offshore units whose station-keeping complies with the Rules.	Pt 3, Ch 10 Positional Mooring Systems
TA(1), TA(2), TA(3)	Assigned where the positional mooring system is assisted by thrusters. The number in brackets defines the thruster allowance.	Pt 3, Ch 10 Positional Mooring Systems

23.2 Descriptive Notes

Descriptive qualification notes may be agreed indicating the type of unit in greater detail than is contained in the class notation, and/or providing additional information about the design and construction.

Descriptive Notes:
Description	Information	Further information
GR (A,S,T,P,E(M,B,I))	Gas-Fuelled Readiness. Assigned to units, with the extension of one or more of the associated characters shown in brackets, detailing the aspects of design and construction that are in accordance with the Rules and Regulations for the Classification of Ships using Gases or other Low-flashpoint Fuels, July 2022	Rules and Regulations for the Classification of Ships using Gases or other Low-flashpoint Fuels, July 2022
National Authority (Norway, USCG, UK)	Assigned to units for which LR has carried out verification in accordance with the Regulations of a coastal state authority – which is identified within the parenthesis.	Pt 1, Ch 4 Verification in Accordance with National Regulations for Offshore Installations
Semi-submersible
Tanker conversion	Unit based on converted tanker
Turret mooring	Turret mooring (internal/external)
Spread mooring	Multi-point positional mooring
Disconnectable unit	Unit can be disconnected from fixed mooring
Helideck	Helicopter deck approval
COW (LR)	Crude oil washing certified by LR	ShipRight Procedures
E	Supporting calculations have been performed in accordance with hull structural finite element and fatigue analysis procedures of a recognised Classification Society	ShipRight Procedures
ES	Enhanced Scantlings	ShipRight Procedures
SEA (HSS-n)	Ship Event Analysis (Hull Surveillance Systems)	ShipRight Procedures
SERS	Ship Emergency Response Service	ShipRight Procedures
SCM	Screwshaft Condition Monitoring	ShipRight Procedures Pt 1, Ch 3, 12.4 Survey extensions
MPMS	Machinery Planned Maintenance Scheme	ShipRight Procedures
MPMS (CM)	Condition Monitoring	ShipRight Procedures
MPMS (PT)	Predictive Techniques	ShipRight Procedures
MPMS (RBM)	Risk Based Maintenance	ShipRight Procedures
MPMS (RCM)	Reliability Centred Maintenance	ShipRight Procedures
BWMP	Ballast Water Management Plan	ShipRight Procedures
ThCM	Thruster Condition Monitoring	ShipRight Procedures
IHM	Inventory of Hazardous Materials	ShipRight Procedures
ESP	Enhanced Survey Programme	Where the owner elects to undertake hull Special Survey in accordance with the requirements of Pt 1, Ch 3, 7 Special Survey - Oil tankers (including ore/oil ships and ore/bulk/oil ships) - Hull requirements of the Rules and Regulations for the Classification of Ships, July 2022
DRILL	See also class notations	When, at the request of an Owner, a unit is to be verified in accordance with the Regulations of a National Administration.
PPF	See also class notations	When, at the request of an Owner, a unit is to be verified in accordance with the Regulations of a National Administration.
Deep draught caisson unit
Concrete hull
Potable Water System
Sea Water Desalination Plant
Human-Centred Design Level 1 -Reactive	Assigned when the development and operation of specified unit 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).