SM UB-78

SM UB-78 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 20 October 1917 as SM UB-78.

UB-78 was sunk on 9 May 1918 off Cherbourg after ramming and depth charging by TS Queen Alexandra, all 35 crew member died in the event.

Construction
She was built by Blohm & Voss of Hamburg and following just under a year of construction, launched at Hamburg on 2 June 1917. UB-78 was commissioned later that same year. Like all Type UB III submarines, UB-78 carried 10 torpedoes and was armed with a 8.8 cm deck gun. UB-78 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8680 nmi. UB-78 had a displacement of 516 t while surfaced and 648 t when submerged. Her engines enabled her to travel at 13.6 kn when surfaced and 7.8 kn when submerged.