Union Navy the set of Army ranks. The most visible change was that henceforth some individuals would be designated commodore, rear admiral, vice admiral, and finally admiral, all new formal ranks, and equivalent to, respectively, brigadier general, major general, lieutenant general, and general. A doctrinal shift took place at the same time. Prior to the war, the United States Navy emphasized single-ship operations, but the nature of the conflict soon made use of whole fleets necessary. Already at the Battle of Port Royal (7 November 1861), 77 vessels, including 19 warships, were employed. This was the largest naval expedition that had ever
Trawlers of the Royal Navy Trawlers of the Royal Navy This is an accounting of the naval trawlers, purpose built or requisitioned, operated by the Royal Navy mainly during World War I and World War II. Vessels purpose built to Admiralty specifications for RN use were known as Admiralty trawlers. All trawlers operated by RN, regardless of origin, were typically given the prefix HMT, which stood for "His Majesty's Trawler". There were also 215 trawlers of no specific class These were commercial trawlers taken over by the Admiralty. The Royal Navy classified requisitioned trawlers by manufacturer, although such classes were more diverse than traditional naval