The Admiralty Yard Craft Service was the civilian service which operated auxiliary vessels for the British Admiralty, mainly in HM Dockyards or the vicinity. It was renamed the Port Auxiliary Service (PAS) on 1 October 1958 and the Royal Maritime Auxiliary Service in 1976 The service operated tugs, harbour ferries, launches, and lighters. Although some of its tugs were classified as ocean-going, it did not operate ocean-going supply vessels, which were the responsibility of the Royal Fleet Auxiliary. The Yard Craft Service crews answered to the Captain's Department in each dockyard.