SM UB-89 was a German Type UB III submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. She was commissioned into the German Imperial Navy on 25 February 1918 as SM UB-89.
UB-89 was lost in a collision with the light cruiser in Kiel. Seven crew members perished in the accident. On 30 October 1918 the boat was raised by the salvage ship . On 7 March 1919, en route to surrender, UB-89 began to drift and was towed to Ymuiden. In 1920, the boat was broken up in Dortrecht
See main article: Type UB III submarine. He was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 22 December 1917. UB-89 was commissioned early the next year under the command of Kptlt. Walter Gude. Like all Type UB III submarines, UB-89 carried 10 torpedoes and was armed with a 10.52NaN2 deck gun. UB-89 would carry a crew of up to 3 officer and 31 men and had a cruising range of 7120nmi. UB-89 had a displacement of 510lk=inNaNlk=in while surfaced and 640t when submerged. Her engines enabled her to travel at 13kn when surfaced and when submerged.
| Date | Name | Nationality | Tonnage[1] | Fate[2] | |
|---|---|---|---|---|---|
| 25 July 1918 | Asta |  Denmark | 121 | Sunk | |
| 9 August 1918 | Emma | 252 | Sunk |