Compliance with design requirements for vessels providing services for offshore installations

Compliance with design requirements for services in harsh weather conditions

Helicopter deck: Additional requirements to helicopter safety

Helicopter deck: Additional requirements to vessel safety

Ballast water treatment

Limitations to vibrationlevels

Additional fire protection for machinery spaces - general

Additional fire protection in accommodation area

Compliance with design requirements for vessels where the EES (Electrica Energy Storage) power is used for electrical propulsion of the vessel.

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Applicable to:

Hybrid vessel where one of the main sources of power is based on EES.

Hybrid vessel having an operational mode where the vessel is operatingon EES power only, withthe other main source ofpower in standby

Hybrid vessel usingthe EES system as are dundant source of power for main and/or additional class notations, e.g. dynamic positioning.

Tail shaft monitoring enables operators to continuously observe and assess the condition of the shaft(s) which may extend interval between tail shaft surveys/tail shaft withdrawal

Vessels intended for navigation in light ice conditions

Clean:

Arrangements for controlling and limiting operational emissions and discharges

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Designed for carriage of liquid with flashpoint lower than 43°C

Tanks or holds strengthened for heavy liquid, where number denotes the maximumdensity in t/m3 in specifiedcargo tanks

NAUT:

Requirements withinbridge design, bridgeinstrumentation andworkstation arrangements.Vessels with NAUT-notationwill comply with theprinciples and aims ofSOLAS V/15 and IMO MSC/Circ.982.

OSV:

Vessels operating asservice vessels for offshoreindustry

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Tanks or holds strengthened for heavy liquid, where number denotes the maximumdensity in t/m3 in specifiedcargo tanks

In compliance with design requirements for periodically unattended machinery spaces

Weather deck strengthenedfor heavy cargo

Vessels designed for enhanced comfort by reducing noise and vibration.Number denotes comfort rating number

Ships carrying special pesonnel who are neither crew members nor passengers

Built for in-water survey of the vessel bottom and related items

Recovered oil reception and transportation

Fire fighting with active protection, giving it the capability to withstand higher heat radiation loads from external fires

Designed for carriage of liquid with flashpoint lower than 43°C

Vessels designed for enhanced comfort by improved indoor climate. Number denotes comfort rating number

Clean:

Arrangements for controlling and limiting operational emissions and discharges

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Design:

Additional design requirements for protection against accidents and for limiting their consequences

Compliance with requirements to damage stability

Compliance with design requirements for vessels providing services for offshore installations

Compliance with design requirements for vessels providing services for offshore installations

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The main class notation 1A will be assigned to vessels with hull, machinery, systems and equipment found to be in compliance with applicable rule requirements

The construction symbol ✠ (*) will be assigned to vessels built under the supervision of the Society.