SM UB-103

SM UB-103 was a German Type UB III submarine or U-boat in the German Imperial Navy (Kaiserliche Marine) during World War I. She was commissioned on 18 December 1917 as SM UB-103.

UB-103 was sunk in the English Channel by British warships and SSZ 1, a SSZ class blimp. All hands were lost.

Construction
She was built by Blohm & Voss of Hamburg and, after just under a year of construction, launched at Hamburg on 7 July 1917. UB-103 was commissioned later the same year, under the command of KptLt Paul Hundius. Like all Type UB III submarines, UB-103 carried 10 torpedoes and was armed with a 8.8 cm deck gun. UB-103 had a crew of up to three officers and 31 men, and its cruising range was 7,420 nmi. UB-103 had a displacement of 510 t while surfaced and 629 t when submerged. Her engines enabled her to travel at 13.3 kn when surfaced and 7.4 kn when submerged.