ABS Class Notations Table - Towmasters: the Master of Towing ...

ÅABS Notations and Symbols – 3 November 2003 (Updated on 25 January 2007)
Steel Vessels < 90 m (295 ft)
NOTATION
Offshore Support Vessel
Offshore Support Vessel, AH
Offshore Support Vessel, WS
DESCRIPTION
Offshore Support Vessel is a vessel primarily engaged in the transport of stores, materials and
equipment to offshore installations and are designed with accommodation and bridge erections in the
forward part of the vessel and an exposed cargo deck in the after part for handling of cargo at sea.
Offshore supply vessels built in accordance with the ABS Rules for Building and Classing Steel
Vessel Under 90 meters (295 feet) in Length including Part 5, Chapter 10 will be assigned the class
notation of Offshore Support Vessel.
Anchor Handling (AH) Service – An Offshore Support Vessel that is also designed and built for
anchor handling operations in accordance with the requirements of Section 5-10-4 of the ABS Rules
for Building and Classing Steel Vessels Under 90 meters (295 feet) in Length will be distinguished by
the class notation AH, i.e., Offshore Support Vessel, AH.
Well Stimulation (WS) Service – An Offshore Support Vessel that is also designed and built for
well stimulation operations in accordance with the requirements of Section 5-10-5 of the ABS Rules
for Building and Classing Steel Vessels Under 90 meters (295 feet) in Length will be distinguished by
the class notation WS, i.e., Offshore Support Vessel, WS.
REFERENCES
5-10-1/3, Section 5-10-4 and 5-10-4/1 of the Rules for Building and Classing Steel Vessels Under 90 Meters (295 Feet) in
Length
REMARKS
Class Notation
Example – À A1 Offshore Support Vessel, À AMS… or
À A1 Offshore Support Vessel, AH, À AMS… or
À A1 Offshore Support Vessel, WS, À AMS…