SM UB-77

SM UB-77 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-77.

UB-77 was surrendered on 16 January 1919 in accordance with the requirements of the Armistice with Germany and broken up in Swansea in 1921.

Construction
She was built by Blohm & Voss of Hamburg and following just under a year of construction, launched at Hamburg on 5 May 1917. UB-77 was commissioned later that same year. Like all Type UB III submarines, UB-77 carried 10 torpedoes and was armed with a 8.8 cm deck gun. UB-77 would carry a crew of up to 3 officer and 31 men and had a cruising range of 8680 nmi. UB-77 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.