The service was divided into 'Afloat' and 'Ashore' sections, The 'Afloat' personnel manned the service's dedicated ships and the 'Ashore' personnel manned the Port Headquarters (PHQ) which were positioned around the United Kingdom (UK). The 'Afloat' section contained engineers, seamen and communications personnel, while the 'Ashore' section consisted of communications and plotting staff, later amalgamated into an 'Operations' section. There was an element of cross-fertilization whereby some people of the 'Afloat' section worked in PHQs as communicators, drivers and security staff and some of the 'Ashore' section worked afloat as engineers, seamen, communicators and, indeed, cooks.
