HMS Ambrose was originally built as a passenger steamship in 1903 by Sir Raylton Dixon and Company of Middlesbrough, costing £89,000. She measured 375.2 feet (114.4 meters) in registered length, with an overall length of 387 feet 5 inches (118.1 meters). Her beam was 47.8 feet (14.6 meters), with a hold depth of 26.4 feet (8.0 meters) and a draught of 20 feet 9 inches (6.3 meters). The vessel's gross registered tonnage was 4,187 GRT, increasing to 4,588 GRT after modifications in 1907, and her net tonnage rose from 2,128 to 2,490 NRT. Ambrose was powered by a three-cylinder triple-expansion steam engine, built by North Eastern Marine Engineering Company, rated between 775 and 800 nhp, or 6,350 ihp, capable of reaching a speed of approximately 14.5 knots. She was equipped with a single screw propeller. Initially operated by Booth Steam Ship Company, Ambrose ran scheduled passenger and cargo services between Liverpool and Brazil, including routes to Manaus. She made her maiden voyage in late 1903 and underwent significant repairs and lengthening in 1906-1907 after running aground in Brazil. Her passenger capacity was increased, and her tonnage was improved accordingly. With the advent of war, Ambrose was requisitioned by the British Admiralty in 1914, converted into an armed merchant cruiser (AMC), and armed with eight 4.7-inch guns and two 6-pounder guns. She served in the 10th Cruiser Squadron, patrolling the waters around the British Isles, Iceland, and Norway, engaging in combat with German submarines, notably surviving multiple attacks in 1915, with suspicions of sinking a submarine during one confrontation. In 1917, she was converted into a submarine depot ship, supporting submarines in various locations including Ireland, Cornwall, and the Far East. Stationed at Hong Kong from 1919 to 1928, she supported the Fourth Submarine Flotilla, including six L-class submarines, and visited Asiatic ports such as Kobe, Nagasaki, Shanghai, and Singapore. Renamed HMS Cochrane in 1938, she was converted into a destroyer depot ship and served through World War II, notably involved in bomb disposal operations. She was decommissioned and scrapped in 1946. Throughout her career, HMS Ambrose/Cochrane exemplified versatility, transitioning from a passenger liner to a vital naval auxiliary, and played a significant role in maritime and wartime operations.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.