SM UB-90

SM UB-90 was a German Type UB III submarine or U-boat in the German Imperial Navy (Kaiserliche Marine) 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 HMS L12 at 57.91667°N, 10.45°W 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 10.5 cm deck gun. UB-90 would carry a crew of up to 3 officer and 31 men and had a cruising range of 7,120 nmi. UB-90 had a displacement of 510 t while surfaced and 640 t when submerged. Her engines enabled her to travel at 13 kn when surfaced and 7.4 kn when submerged.