Regulation 37 of MARPOL Annex I requires that oil tankers of 150 gross tonnage and above and all ships of 400 gross tonnage and above carry an approved Shipboard Oil Pollution Emergency Plan (SOPEP).
As a part of this contingency planning, vessels under 400′ require a 7 barrel (11 OOL) Marine Spill Kit. Vessels over 400′ require a 12 barrel (1900L) marine Spill Kit.
These spill kits contain a variety of oil only absorbents and PPE for addressing shipboard spills.
SOPEP=Shipboard Oil Spill Pollution Emergency Plan