SM UB-73

SM UB-73 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 2 October 1917 as SM UB-73.

UB-73 was serving in the Mediterranean. On 21 November 1918 she was surrendered to France as required by the regulations of the Armistice with Germany.

Construction
UB-72 was ordered by the GIN on 23 September 1916.

She was built by AG Vulcan of Hamburg and following just under a year of construction, launched at Hamburg on 11 August 1917. UB-73 was commissioned later that same year. Like all Type UB III submarines, UB-73 carried 10 torpedoes and was armed with a 8.8 cm deck gun. UB-73 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8,420 nmi. UB-73 had a displacement of 508 t while surfaced and 639 t when submerged. Her engines enabled her to travel at 13.4 kn when surfaced and 7.5 kn when submerged.