What are the possible consequences of sailing without a crew member listed on the Safe Manning Document?

(a) The Merchant Shipping (Safe Manning, Hours of Work and Watchkeeping) Regulations 1997; and (b) section 49 of the Merchant Shipping Act 1995 (Prohibition of going to sea undermanned); (2) detention of the ship at a UK port; (3) detention of the ship at a non-UK port by a port State control inspector; (4) loss of defences to claims for cargo loss or damage; (5) possible loss of Hull & Machinery insurance cover (breach of "due diligence" requirement).