SM UB-90 was a German Type UB III submarine or U-boat in the German Imperial Navy () during World War I. She was commissioned into the German Imperial Navy on 21 March 1918 as SM UB-90.
On 16 October 1918, UB-90 was hit by a torpedo from at and sunk. All 38 crew members died in the event.
Construction
She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 12 February 1918. UB-90 was commissioned early the next year under the command of Oblt.z.S. Gottfried von Mayer. Like all Type UB III submarines, UB-90 carried 10 torpedoes and was armed with a deck gun. UB-90 would carry a crew of up to 3 officer and 31 men and had a cruising range of . UB-90 had a displacement of while surfaced and when submerged. Her engines enabled her to travel at when surfaced and when submerged.
Summary of raiding history DateNameNationalityTonnageTonnages are in gross register tonsFate29 July 1918Douro850Captured as prize3 October 1918Eupion3,575Sunk
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