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Special purpose ship, International Maritime Organization codes

Seeking views on new guidance for offshore vessels about applying the International Maritime Organization and special purpose ship codes.

Last fetched 03 May 2026 · gov.uk

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We are seeking feedback on new guidance for vessels that operate in the offshore sector which concerns:

applying the special purpose ship (SPS) code
applying International Maritime Organization codes and guidelines other than the SPS code such as the mobile offshore drilling unit code

The 2 new draft marine guidance notes (MGN) replace existing guidance in MGN 390.

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