(1) For UK ships at sea in the UK territorial sea or on the high seas: Department for Transport Maritime Security (formerly known as TRANSEC);
(2) for UK ships in the territorial sea of another State: the Contracting Government (i. e. the coastal State); (3) for UK ships in UK ports: Department for Transport Maritime Security; (4) for UK ships in foreign ports: the Contracting Government (i. e. the port State).
