 Depot ships operating within such bases may provide little more than command staff offices, while depot ships operating at remote bases may perform unusually diverse support functions.Some United States Navy submarine depot ships operating in the Pacific during World War II included sailors with Construction Battalion ratings to clear recreational sites and assemble buildings ashore, while the Royal Navy mobile naval bases included specialized amenities ships to meet recreational needs of British Pacific Fleet personnel.Services provided by a depot ship depend upon whether typical client warship missions are measured in hours, or days, or weeks.