4 September 1918
| 6/8 February 1917|
29 July 1918
| 3,654,000 German Papiermark|
AG Vulcan Stettin, Hamburg
SM UB-99 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 4 September 1918 as SM UB-99.
UB-99 was surrendered on 21 November 1918 and served in the French Navy until 1935 under the name Carissan.
SM UB-99 Wikipedia
She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 29 July 1918. UB-99 was commissioned later the same year under the command of Oblt.z.S. Erich Förste. Like all Type UB III submarines, UB-99 carried 10 torpedoes and was armed with a 10.5 cm (4.13 in) deck gun. UB-99 would carry a crew of up to 3 officer and 31 men and had a cruising range of 7,120 nautical miles (13,190 km; 8,190 mi). UB-99 had a displacement of 510 t (500 long tons) while surfaced and 640 t (630 long tons) when submerged. Her engines enabled her to travel at 13 knots (24 km/h; 15 mph) when surfaced and 7.4 knots (13.7 km/h; 8.5 mph) when submerged.