HNoMS Tyr was a Gor-class Rendel gunboat constructed at Karljohansverns Verft Naval Yard in Horten, Norway. Laid down in 1884 and launched in 1887, she bore the build number 67. The vessel was part of a two-ship class, alongside HNoMS Gor, and was an improved version of the Vale-class gunboats, with a displacement of approximately 290 tons, slightly larger than the standard 250 tons of the Vale class. The ship's main armament comprised a 7.8-meter-long gun, which accounted for about a quarter of her total length. She was also equipped with three revolving guns for close-range defense. In the period leading up to World War I, Tyr was rebuilt as a minelayer, replacing her heavy gun with a modern 12 cm breech-loader and upgrading one of her 37 mm guns to a 76 mm gun. This conversion allowed her to carry up to 55 mines. By 1940, she further enhanced her anti-aircraft capabilities with the addition of two Madsen machine guns. Tyr played a notable role during the German invasion of Norway on April 9, 1940. Under the command of Captain F. Ulstrup, she was dispatched to mine the approaches to Lerøy and Bergen, successfully laying mines in strategic waterways. Her minelaying resulted in the sinking of several German vessels, including the supply ship Sao Paulo and the merchant Liege, while damaging others such as Johann Wessels and Gerda. During the invasion, she engaged German E-boats and even damaged one with her 37 mm gun. Later, Tyr was involved in the Battle of Uskedal in April 1940, providing artillery support and engaging German forces. After being forced to retreat and subsequently captured by German forces, she was used by the Germans in their mining operations, including attempts to block the Sognefjord. She was involved in combat actions, including an ambush by Norwegian forces, and was ultimately returned to the Norwegian Navy after the war. Post-war, Tyr was repurposed for civilian use, including conversions to a heavy lift steamship, a car ferry (renamed Bjørn West in 1951), and a heavy-transport vessel. As of 2006, she served as a floating storage vessel, with restoration efforts noted in 2014. Her history reflects her versatility and significance in Norwegian naval and maritime history.

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