Section
2 Definitions, character of classification and class notations
2.1 General definitions
For the purpose of class notations, the definitions given in Pt 1, Ch 2, 2.1 General definitions 2.1.1 to Pt 1, Ch 2, 2.1 General definitions 2.1.24 will apply.
2.1.1
Accommodation unit is a support unit whose primary function is to provide
accommodation for more than twelve offshore personnel who are not crew members or
passengers.
2.1.2
Buoy units are floating units used as a mooring facility for a ship or an
offshore unit and are secured by a flexible tether or tethers to the sea bed.
2.1.3
Clear water. Water having sufficient depth to permit the normal development
of wind generated waves.
2.1.4
Coastal State Authority is the Authority responsible for the safety standards
of units operating in or adjacent to their territorial waters.
2.1.5
Column-stabilised semi-submersible units have working platforms supported on
widely spaced buoyant columns. The columns are normally attached to buoyant lower
hulls or pontoons. These units are normally floating types but can be designed to
rest on the sea bed, see also
Pt 1, Ch 2, 2.2 Modes of operation 2.2.3.
2.1.6
Deep draught caisson units are floating units which operate at a deep draught
in relation to their overall depth.
2.1.7
Disconnectable units are self-propelled floating units which normally operate
at a fixed location but are designed to disconnect from their moorings in order to
avoid hazards or extreme storm conditions.
2.1.8
Fetch. The extent of clear water across which a wind has blown before
reaching the unit.
2.1.9
Floating offshore installation. For classification a floating offshore
installation is an offshore unit, and its integral associated offshore mooring
facility, that operates at a fixed geographic location for its entire service life.
When the mooring facility is independent of the offshore unit, e.g., buoy or mooring
tower, classification of the floating offshore installation will normally be subject
to the buoy or mooring tower being classed separately by LR unless agreed otherwise
by the Classification Committee, see also Pt 3 Functional Unit Types and Special Features and Pt 4, Ch 4 Structural Unit Types.
2.1.10
Mobile offshore unit. For classification a mobile offshore unit is an
offshore unit that operates at and transits between different locations.
2.1.12
National Authority is the Marine Authority in the country in which a unit is
registered.
2.1.13
Offshore unit means a unit engaged in offshore operations including drilling,
oil production and storage, accommodation and other support functions and which
generally operates within the territorial waters of a flag state, but excluding the
ship types defined in Pt 4 Ship Structures (Ship Types) of the Rules for Ships.
2.1.14
Owner. In the context of these Rules, the Owner is defined as the party
responsible for the unit, including its operation and safety.
2.1.15
Positional mooring. Station-keeping by means of multi-leg mooring systems
with or without thruster assistance. Other definitions for mooring facilities are
contained in Pt 3, Ch 10 Positional Mooring Systems.
2.1.16
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 unit’s weather deck at infrequent intervals only, or not at
all.
2.1.17
Self-elevating units are units which are designed to operate as sea
bed-stabilised units in an elevated mode. These units have a buoyant hull with
movable legs capable of raising the hull above the surface of the sea. The legs may
be designed to penetrate the sea bed, or be attached to a mat or individual footings
which rest on the sea bed. See also
Pt 1, Ch 2, 1.4 General 1.4.9.
2.1.18
Self-propelled means that the unit is designed for unassisted sea passages
and is fitted with propelling machinery in accordance with LR Rules.
2.1.19
Sheltered water. Water where the fetch is six nautical miles or less.
2.1.20
Ship units are mono-hull surface type units engaged in production and/or
oil/gas storage/offloading while permanently moored at offshore locations with a
ship or barge hull form. Such units may be self-propelled or be built without
primary propelling machinery.
2.1.21 Specially considered (in connection with close-up surveys and
thickness measurements) means sufficient close-up inspection and thickness
measurements are to be taken to confirm the actual average condition of the
structure under the coating.
2.1.22
Support units are units whose primary function is to support offshore
installations. They are normally engaged in one or more of the following functions:
- crane operations, fire-fighting, diving operations, maintenance,
construction, pipelaying and accommodation.
2.1.24
Surface type units are units with a ship or barge-type displacement hull of
single or multiple hull construction intended for operation in the floating
condition.
2.1.25
Tension-leg units are offshore units which are linked to a fixed foundation
by means of tensioned mooring tethers or other parallel, near vertical, connections
in such a manner that the unit is constrained to float at a draught greater than
that consistent with its displacement when floating freely.
2.2 Modes of operation
2.2.1 A mode of operation is a condition or manner in which a unit may operate
or function while on location or in transit. From the classification aspect, the
modes of operation of a unit should include the following:
-
Operating condition
The condition when a unit is on location, for the purpose of
carrying out its primary design operations, and the combined
environmental and operational loadings are within the appropriate design
limits established for such operations. The unit may be either afloat or
supported on the sea bed, as applicable.
-
Survival condition
A severe storm condition during which a unit may be
subjected to the most severe environmental loadings for which the unit
is designed. Production, drilling or similar operations may have been
discontinued due to the severity of the environmental loadings. The unit
may be either afloat or supported on the sea bed, as
applicable.
-
Transit condition
All unit movements from one geographical location to
another.
- Site-installation and re-floating condition
This condition is only applicable to self-elevating units.
This condition comprises elevating and lowering the legs, touchdown of
the legs/bottom mats with the sea bed and preloading.
For ship units and other surface type units, the modes of operation will
be defined by the loading conditions stated in the approved loading manual.
2.2.2
Linked means connected while operating to a single point mooring facility,
fixed structure or otherwise attached or resting on the sea bed.
2.2.3
Sea bed-stabilised means designed to operate under normal operating and
survival conditions while the footings, mat or pontoons rest on the sea bed.
2.3 Character Symbols
2.3.1 All units, when classed, will be assigned one or more character symbols,
as applicable. For the majority of floating offshore installations at a fixed
location, the character assigned will be ✠OI 100AT or ✠OI 100AT (1).
For the majority of mobile offshore units, the character assigned will be ✠OU
100A1.
2.3.2 A full list of character symbols for which offshore units may be
eligible is as follows:
✠ |
= |
This distinguishing mark will be assigned, at the time of
classing, to new units 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, at the time of
classing, to new units constructed under LR’s Special Survey, in accordance
with plans approved by another recognised classification society. |
|
= |
This distinguishing mark, will be assigned to units built under
supervision of another IACS member society and later assigned class with LR.
For such units the class notations will be reviewed separately and
equivalent notations will be assigned. |
OI
|
= |
These character letters will be assigned to all units which
have been built or accepted into Class in accordance with the requirements
prescribed for floating offshore installations at a fixed location in LR’s
Rules and Regulations the Classification of Offshore Units. |
OU
|
= |
These character letters will be assigned to all units which have
been built or accepted into Class in accordance with the requirements
prescribed for mobile offshore units in LR’s Rules for Offshore Units. |
100
|
= |
This character figure will be assigned to all units considered
suitable for operating at exposed locations offshore or for sea-going
service. |
A
|
= |
This character letter will be assigned to all units 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)
Units having on board, in good and efficient condition, anchoring and/or
mooring equipment in accordance with Pt 4, Ch 9 Anchoring and Towing Equipment of the Rules.
(b) Units classed for 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.
(c) Units equipped with a
classed dynamic positioning system which has sufficient power,
redundancy of components and duplication of controls to supplement or
replace the anchoring equipment on board such that the combined
system/equipment is approved by the Classification Committee as
equivalent to the anchoring equipment necessary during voyages, transfer
moves or under normal operating conditions, see Pt 3, Ch 9 Dynamic Positioning Systems.
|
T
|
= |
This character letter will be assigned to floating offshore
installations at a fixed location which have, in good and efficient
condition, anchoring, mooring or linking equipment in accordance with the
Rules, see Pt 3, Ch 10 Positional Mooring Systems. |
N
|
= |
This character letter will be assigned to installations on
which the Classification Committee has agreed that anchoring and mooring
equipment need not be fitted in view of their particular service. |
Note For classification purposes, the character figure 1, and either of the
character letters T or N, is to be assigned.
2.3.3 Non-propelled units which are required to make transit voyages from one
operating site to another are to be fitted with towing arrangements in accordance
with Pt 4, Ch 9 Anchoring and Towing Equipment.
2.3.4 Self-propelled units which are required by the Owners to make transit
voyages from one operating location to another or are disconnectable to avoid severe
storms or hazards are to comply with the requirements of Pt 1, Ch 2, 2.3 Character Symbols 2.3.2 for the assignment of the character figure (1)
which will be assigned after the character letter T. The disconnection or
reconnection of a disconnectable unit is to be to the satisfaction of the Surveyor.
For disconnections to avoid severe storms or hazards see
Pt 1, Ch 2, 3.8 Notice of surveys 3.8.2.
2.3.5 In cases where the anchoring and/or mooring equipment is found to be
seriously deficient in quality or quantity, the class of the unit will be liable to
be withheld.
2.3.6 The character figure 100 will be omitted for units operating in
protected waters such as harbours, inland lakes, etc., and the requirements of the
Rules may be relaxed or otherwise amended as considered appropriate by the
Classification Committee.
2.3.7 Units will not be classed unless the primary propelling machinery and/or
the essential auxiliary machinery of the unit is also classed.
2.4 Class notations (hull/structure)
2.4.1 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 unit. This class
notation will consist of one of, or a combination of, the following:
- A type notation.
- A special features notation.
- A special duties notation.
- A specified operating area.
- A service restriction notation.
- An operating limits notation.
A table summarising the notations given in this Part of the Rules and
other notations listed elsewhere in the Rules can be found in Part 1, Appendix 1.
2.4.2
Type notation. A notation indicating that the unit has been arranged and
constructed in compliance with the particular Rules intended to apply to that type
of unit, e.g., Mobile offshore drilling unit or Floating Production Unit. Typical
type notations are defined in Pt 3 Functional Unit Types and Special Features.
2.4.3
Special duties notation. A notation indicating that the unit has been
designed, modified or arranged for special duties other than those implied by the
type notation, e.g., oil exploration or well intervention. Units with special duties
notations are not thereby prevented from performing any other duties for which they
may be suitable.
2.4.5 Operating limits notation. A notation indicating the significant design
criteria on which approval of the unit is based, e.g.:
- Maximum operating environmental design limits for
semi-submersible units and self-elevating units.
- Limiting sea state and/or wind speed during which a unit may
remain moored to a single point mooring.
2.4.6
Service restriction notation. A notation indicating that the unit 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.
2.4.8 Where a service notation is applicable, certain exemptions may be
granted. Where these affect statutory requirements, such as Load Lines, the Owner is
to obtain the authorisation of the Flag State. Such exemptions are to be recorded on
the Class certificate and any applicable statutory certificate.
2.4.9
Protected waters service. Service in sheltered water adjacent to sand banks,
reefs, breakwaters or other coastal features.
2.4.10
Specified operating area. A notation indicating that the unit has been
classed on the understanding that it will be operated only in suitable areas which
have been agreed by the Classification Committee, e.g., North Sea service (Abbot
Field) or Black Sea service.
2.4.11 A typical example of character of a hull class notation for a floating
offshore installation at a fixed location is:
✠OI 100AT Floating Production, Storage and Offloading Unit,
PPF, North Sea service (Alma Field), OIWS, LI.
A typical example of a hull class notation for a mobile offshore unit
is:
✠OU 100A1 Mobile offshore drilling unit, DRILL, Gulf of
Mexico service.
2.4.12 The assigned character symbols of class and the appropriate class
notations will be entered in the Class Direct website. For all unit types except
ship units and other surface type units, the limiting structural design criteria on
which classification is based will also be entered on the Class Direct website.
2.4.13 The following special features class notations may be assigned as
considered appropriate by the Classification Committee:
PPF This notation will be assigned to units which have
specialised structures and an installed process plant facility which has been
constructed, installed and tested under LR’s Special Survey and in accordance with
LR’s Rules and Regulations or recognised Codes and Standards accepted by LR,
see
Pt 3, Ch 8 Process Plant Facility.
DRILL This notation will be assigned to units which have
specialised structures and an installed drilling plant facility which has been
constructed, installed and tested under LR’s Special Survey and in accordance with
LR’s Rules and Regulations, see Pt 3, Ch 7 Drilling Plant Facility.
DROPS This notation will be assigned to units which have
preventive measures to protect personnel from the hazards of dropped objects in
accordance with Pt 3, Ch 1, 8 Risks to personnel from dropped objects.
PM This notation will be assigned to mobile offshore units which
have a positional mooring system which complies with the requirements of Pt 3, Ch 10 Positional Mooring Systems.
PMC This notation will be assigned to mobile offshore units which
have a positional mooring system for mooring in close proximity to other vessels or
installations which complies with the requirements of Pt 3, Ch 10 Positional Mooring Systems.
PRS This notation will be assigned to units which have a product
riser system which has been constructed, installed and tested under LR’s Special
Survey, in accordance with LR’s Rules, see Pt 3, Ch 12 Riser Systems.
OIWS This notation for In-Water Survey may be assigned to a unit
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, 2.1 General 2.1.3 and Pt 8, Ch 1, 1.3 External zone protection.
PLS This notation will be assigned to mobile offshore units which
are fitted with LR-classed pipe-laying equipment. The pipe-laying equipment is to be
constructed, installed and tested under LR’s Special Survey and in accordance with
LR’s Code for Lifting Appliances in a Marine Environment, July 2022
(as applicable), see
Pt 3, Ch 17 Pipe-laying Units.
2.4.14 The OIWS notation may be assigned to existing units on
satisfactory completion of the Survey, provided that the applicable requirements of
LR’s Rules and Regulations are complied with.
2.4.15
LI. This notation will be assigned to surface type units where an approved
loading instrument has been installed as a classification requirement.
2.4.17 The following class notations may be assigned to ship units as
considered appropriate by the Classification Committee:
-
ShipRight SDA. This notation can be assigned to both new build ship
units and tanker conversions when structural strength of the hull has been
assessed for environmental loads assuming unrestricted service as a ship.
The structural strength of the hull is to be verified using the finite
element method.
-
ShipRight RBA. The response based analysis (structure) class notation
will be assigned to both new build ship units and tanker conversions when
structural strength has been verified by performing direct calculations
(finite element analysis) for hull structure in accordance with the
ShipRight Procedure for Ship Units.
-
ShipRight FDA (years). The fatigue design assessment (design life)
class notation will be assigned to both new build ship units and tanker
conversions when fatigue life of critical connection details has been
assessed in accordance with the ShipRight Procedure for Ship Units.
-
ShipRight CM. The construction monitoring class notation will be
assigned to new build ship units and tanker conversions when agreed enhanced
inspection measures have been implemented and verified during construction
to ensure that at critical locations the connection details are within the
agreed tolerances. Critical locations are to be agreed with LR on a case by
case basis. A plan showing critical locations is to be submitted for
approval, in accordance with the ShipRight Procedure for Ship Units.
-
CSR. This notation indicates that the structure has been verified as
fully compliant with IACS CSR. This notation cannot be assigned
retrospectively. It may only be assigned to new build units or units which
already had a CSR notation assigned before conversion or
redeployment.
Assignment of these notations will be project-specific and will depend
on whether the unit is a new build or tanker conversion, whether the unit is
permanently moored or disconnectable and the site-specific environmental conditions,
see Table 2.4.1. The design procedures given in the ShipRight
Procedure for Ship Units, are required to be applied for hull strength,
fatigue and construction aspects. Assignment of these notations will be specially
considered for other surface type units.
Table 2.2.1 Application of ShipRight Notations
ShipRight notation
|
Redeployment and conversion
|
New build
|
Moderate environment
|
Harsh environment
|
Moderate environment
|
Harsh environment
|
RBA
|
Either RBA or SDA is
required
|
Mandatory
|
Either RBA or SDA is
required
|
Mandatory
|
FDA (years)
|
Mandatory
|
Mandatory
|
Mandatory
|
Mandatory
|
CM
|
Mandatory
|
Mandatory
|
Mandatory
|
Mandatory
|
SDA
|
Either RBA or SDA is
required
|
N/A
|
Either RBA or SDA is
required
|
N/A
|
2.4.18 The ShipRight SDA notation may be retained by LR Classed tankers
after conversion to a floating offshore installation at a fixed location for service
in a moderate environment as defined in Pt 10, Ch 1, 1.2 Definitions 1.2.3.
2.4.19 The following class notation may be assigned to column-stabilised
semi-submersible units as considered appropriate by the Classification
Committee:
- ShipRight RBA. The response based analysis class notation
will be assigned when the structural strength has been verified by performing
direct calculations (finite element analysis) for hull structure in accordance
with the ShipRight Procedure for Semi-submersibles.
- ShipRight FDA3 (years). The fatigue design assessment
(design life) class notation will be assigned to column-stabilised
semi-submersible units when fatigue life of critical connection details has been
assessed in accordance with the ShipRight Procedure for
Semi-submersibles.
- ShipRight CM. The construction monitoring class notation will
be assigned to column-stabilised semi-submersible units when agreed enhanced
inspection measures have been implemented and verified during construction to
ensure that at critical locations the connection details are within the agreed
tolerances. Critical locations are to be agreed with LR on a case by case basis.
A plan showing critical locations is to be submitted for approval, in accordance
with the ShipRight Procedure for Semi-submersibles.
2.4.20 Special consideration will be given to assignment of additional notations
given in Pt 1, Ch 2 Classification Regulations of the Rules for Ships at the request of
the Owner. The assignment of such notations will be conditional on compliance with
all applicable requirements relevant to the unit type and service.
2.5 Class notations (machinery)
2.5.1 The following class notations are associated with machinery construction
and arrangements, and may be assigned as considered appropriate by the
Classification Committee:
✠Lloyd’s RGP This notation will be assigned when a regasification
system and arrangements have been constructed, installed and tested under Lloyd’s
Register’s (hereinafter referred to as LR’s) Special Survey and in accordance with
the relevant requirements of the Rules.
✠Lloyd’s RGP+ This notation will be assigned when a
regasification system and arrangements have been constructed, installed and tested
under LR’s Special Survey and in accordance with the relevant requirements of the
Rules and the system is configured to allow continuing operation in the event of a
single failure.
✠OMC This notation will be assigned to non-propelled units when
the essential auxiliary machinery has been constructed, installed and tested under
LR’s Special Survey and in accordance with LR Rules.
[✠] OMC This notation will be assigned to non-propelled units
when:
- the 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.
- other items of machinery and electrical power generation and
other auxiliary machinery for essential services are in compliance with LR’s
Rules and supplied with the manufacturer’s certificate.
- the system arrangement of essential auxiliary machinery is
appraised and found to be acceptable to LR.
OMC This notation (without ✠) will be assigned to existing
non-propelled units that will be accepted or transferred into LR class when:
- the essential auxiliary machinery has 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.
✠LMC This notation will be assigned when the propelling and
essential auxiliary machinery has been constructed, installed and tested under LR’s
Special Survey and in accordance with LR Rules.
[✠] LMC This notation will be assigned to self-propelled units
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.
- 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.
- the system arrangements of propelling and essential auxiliary
machinery are appraised and found to be acceptable to LR.
LMC This notation (without ✠) will be assigned to existing self-propelled
units that will be accepted or transferred into LR class when:
- the propelling and essential auxiliary machinery has 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.
IGS This notation will be assigned, when a unit having facilities for the
storage of crude oil in bulk is fitted with an approved system for producing gas for
inerting the crude oil storage tanks.
CAC1, 2 or 3 Crew Accommodation Comfort. This notation may be
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. 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 This notation will be assigned when installed fresh water systems have
been designed, constructed and tested under LR’s Special Survey and in accordance
with LR Rules.
LFPF (GF, NG or EG or LP or HG or ML) Low
flashpoint fuel. This notation may be 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
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:
- GF - Assigned to ships other than liquefied gas carriers or tankers,
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. The notation also indicates that the low flashpoint fuelled machinery
has been constructed, arranged, installed and tested in accordance with the LR
Rules and Regulations applicable to the fuel(s) used.
- NG - Natural Gas
- EG - Ethane Gas
- LP - Liquid Petroleum Gas
- HG - Hydrogen Gas
- ML – Methanol
2.5.2 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
unit 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 that it 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 the unit’s 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 unit 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 has been arranged, installed and tested in
accordance with LR’s Rules.
2.5.3 The following special features class notations are associated with
dynamic positioning arrangements and may be assigned as considered appropriate by
the Classification Committee, see Pt 3, Ch 9 Dynamic Positioning Systems:
DP(CM) This notation may be assigned when a unit 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 unit is fitted with automatic
main and manual 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 that it is equivalent thereto.
DP(AA) This notation may be assigned when a unit 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 that it is equivalent thereto.
DP(AAA) This notation may be assigned when a unit 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 that it is equivalent thereto.
2.5.4 The dynamic positioning notations in 2.5.3 can be supplemented with a
Performance Capability Rating notation (PCR). 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), see Pt 3, Ch 9 Dynamic Positioning Systems.
2.5.5 Machinery class notations will not be assigned to units the
hull/structure of which is not classed or intended to be classed with LR.
2.5.6 The notations ✠ LMC, [✠] LMC and LMC (without ✠)
will not, in general, be assigned to non-self-propelled vessels.
2.5.7 Special consideration will be given to assignment of the additional
notations given in Pt 1, Ch 2 Classification Regulations of the Rules for Ships, at the request of the Owner.
The assignment of such notations will be conditional on compliance with all
applicable requirements relevant to the unit type and service.
2.6 Lifting Appliances
2.6.1 LA. This mandatory notation is assigned where one or more lifting
appliances are considered to be an essential feature of the vessel, e.g. cranes on
crane barges, lifting arrangements for diving on diving support vessels. See
Pt 3, Ch 11 Lifting Appliances and Support Arrangements.
2.6.2 . This mandatory notation is 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. See
Pt 3, Ch 11 Lifting Appliances and Support Arrangements.
2.7 Class notations (environmental
protection)
2.7.1 The following class notations are associated with the design and
operation of a unit and may be assigned as considered appropriate by the
Classification Committee, on application from the Owners, see Pt 7, Ch 11 Arrangements and Equipment for Environmental Protection (ECO Class Notation) of the Rules for Ships:
ECO This notation will be assigned when a unit is designed and operated in
accordance with the relevant requirements of the Rules for Ships.
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
unit is operated in accordance with the relevant requirements of the Rules for
Ships.
2.8 Class notation (Verification
Schemes)
2.9 Descriptive Notes/Supplementary
Character
2.9.1 In addition to any class notations, appropriate descriptive qualification
notes may be entered on the Class Direct website 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, e.g. semi-submersible. A descriptive
qualification is not a LR classification notation and is provided solely for
information. Examples of descriptive notes are:
Semi-submersible
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Tanker
conversion
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Unit based on converted
tanker
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Turret mooring
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Turret mooring
(internal/external)
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Spread mooring
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Multi-point positional
mooring
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Disconnectable unit
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Unit can be disconnected from
fixed mooring
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Floating Clean energy
Support Structure
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Floating structures at a fixed
location for clean energy example: semi subs, TLP’s, novel
designs
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Helideck
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Helicopter deck
approval
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COW (LR)
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Crude oil washing certified by
LR
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SBT (LR)
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Segregated
ballast tanks certified by LR.
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Potable Water
System
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Sea Water
Desalination Plant
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2.9.2 When a notation is assigned in accordance with Pt 1, Ch 2, 2.8 Class notation (Verification Schemes), a supplementary character will
also be added to indicate the applicable National Administration, e.g. Norwegian
Verification (N), United Kingdom Verification (UK).
2.9.3 Where an approved loading instrument is provided as an Owner’s
requirement, a descriptive note LI may be entered on the Class Direct
website.
2.9.4 ShipRight(). Where LR’s ShipRight Procedures for the
following have been applied on a voluntary basis to surface type units, a
descriptive note showing the associated characters of the Procedure(s) within
brackets will, at the Owner’s request, be entered on the Class Direct website,
preceded by the word ShipRight e.g. ShipRight(ES, SERS) , see
also ShipRight Procedures Overview and Pt 1, Ch 2 Classification Regulations of the Rules and Regulations for the Classification of Ships, July 2022:
ES
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Enhanced Scantlings
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SEA (HSS-n)
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Ship Event Analysis (Hull
Surveillance Systems)
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SERS
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Ship Emergency Response
Service
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SCM
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Screwshaft Condition
Monitoring
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MPMS
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Machinery Planned Maintenance
Scheme
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MPMS(CM)
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Condition Monitoring
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MPMS(PT)
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Predictive Techniques
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MPMS(RBM)
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Risk Based Maintenance
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MPMS(RCM)
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Reliability Centred
Maintenance
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BWMP
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Ballast Water Management
Plan
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ThCM
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Thruster
Condition Monitoring
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HCD1()
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Human-Centred
Design Level 1
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A table summarising the descriptive notes given in this part of the
Rules and other notes listed elsewhere in the Rules can be found in Pt 1, Ch 3, 23.2 Descriptive Notes.
2.9.5 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, then, on application from Owners, the descriptive
note ShipRight (E) may be entered on the Class Direct website.
2.9.7 Where an Owner meets the requirements of the ShipRight Procedure to
obtain IHM (Inventory of Hazardous Materials) certification, the ShipRight
descriptive note IHM (Inventory of Hazardous Materials) will be assigned and
entered on the Class Direct website.
2.9.8 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 Approval 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.
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