HMS Calgarian was originally an Allan Line steam turbine ocean liner built in 1914 by the Fairfield Shipbuilding and Engineering Company in Govan, Glasgow. She measured approximately 590 feet (179.8 meters) in length on the waterline and 570 feet (173.7 meters) between perpendiculars, with a molded beam of 70 feet (21.3 meters). Her depth to the bridge deck was 54 feet (16.5 meters), and her designed draught was 28 feet 6 inches (8.7 meters). The vessel had a gross register tonnage of 17,515 GRT and a net tonnage of 10,787 NRT. She featured eleven watertight bulkheads and a double bottom to enhance her seaworthiness. Calgarian was powered by four screws driven by Parsons-type steam turbines—an outer high-pressure turbine exhausting into a medium-pressure turbine for the outer shafts, and two central low-pressure turbines capable of reversal. This configuration enabled her to achieve a sea speed of around 19 knots, with trials reaching up to 21.25 knots. Her propulsion system was supported by six double-ended and four single-ended boilers, providing ample steam, and electrical power was supplied by three 250 kW steam-driven generators. Designed primarily for transatlantic passenger service between Liverpool, England, and Canadian ports such as Quebec and Montreal, Calgarian could carry up to 200 first-class, 500 second-class, and 1,000 third-class passengers, with a crew of 500. Her passenger accommodations were distributed across eight decks, from the boat deck to the orlop, and included innovative features such as a scouting motor launch equipped with wireless telegraphy. In 1914, she was requisitioned by the Royal Navy and converted into an armed merchant cruiser, armed with eight 6-inch guns. Assigned to the 9th Cruiser Squadron, she patrolled off West Africa and the east coast of the United States, including Halifax and New York, before returning to transatlantic service. Notable during her wartime service was her involvement in rescue efforts following the Halifax Explosion of December 1917. Her service ended when she was torpedoed and sunk by the German U-boat U-19 off Rathlin Island on 1 March 1918, resulting in the loss of 49 men. Calgarian’s design and operational history highlight her significance as both an early 20th-century ocean liner and a wartime naval auxiliary.

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