Surveys according to MARPOL annex II
Surveys according to MARPOL annex II applies to ships carrying noxious liquid substances in bulk. A tank from which a substance in category X has been unloaded shall be prewashed before the ship leaves the port of unloading. The resulting residues shall be discharged to a reception facility. Ships may be exempted from the prewash if the criteria are met. Surveys according MARPOL annex II are carried out by suppliers approved by the Norwegian Maritime Authority.