HMS Hilary was originally a passenger steamship built in Scotland in 1908 by Caledon Shipbuilding & Engineering for Booth Line. She was constructed with a length typical of early 20th-century passenger vessels, featuring twin screws powered by triple-expansion engines, which collectively produced 848 NHP, allowing her to reach a top speed of approximately 14.5 knots. The vessel had a gross register tonnage of 6,326 GRT and a net tonnage of 3,626 NRT, making her one of the largest ships in Booth’s fleet upon her launch. She was registered in Liverpool, with the official number 127917 and the wireless call sign MDP, indicating her early adoption of Marconi wireless telegraphy. Hilary was designed to serve scheduled routes between Liverpool and Brazil, with passenger accommodations for 100 first-class and 300 third-class passengers. Her service included regular sailings to Manaus, navigating the Amazon River, reflecting her role in connecting Europe with South America during peacetime. She was launched on 31 March 1908 and completed by August of the same year. In her wartime service, Hilary was requisitioned by the British Admiralty in September 1914 and converted into an armed merchant cruiser (AMC). Fitted with six 6-inch guns and two 6-pounders, she served in the 10th Cruiser Squadron, patrolling the Atlantic as part of the Allied blockade of Germany. Her duties included patrolling between the British Isles and the Denmark Strait, often operating around the Outer Hebrides, Shetland Islands, and Faroe Islands. Hilary’s service ended tragically on 25 May 1917 when she was torpedoed and sunk by the German U-boat SM U-88 west of Lerwick. Despite attempts to defend herself and send distress signals, multiple torpedoes struck her, causing extensive damage and leading to her sinking. The crew abandoned ship, with survivors rescued by nearby vessels. Notably, Hilary was involved in a reported encounter with a sea serpent shortly before her sinking, adding a layer of maritime folklore to her history. Her sinking marked the loss of an important passenger and wartime vessel, exemplifying the perils faced by merchant ships during World War I.

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