SM UB-103 was a German Type UB III submarine or U-boat in the German Imperial Navy () during World War I. She was commissioned on 18 December 1917 as SM UB-103.
UB-103 was sunk in the English Channel at by British warships and SSZ 1, a SSZ class airship. 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 deck gun. UB-103 had a crew of up to three officers and 31 men, and its cruising range was . UB-103 had a displacement of while surfaced and when submerged. Her engines enabled her to travel at when surfaced and when submerged.
Summary of raiding history DateNameNationalityTonnageTonnages are in gross register tonsFate20 March 1918Eros858Sunk21 March 1918Tyrhaug1,483Sunk24 March 1918Anteros4,241Sunk22 April 1918Eric Calvert1,862Sunk28 April 1918Elba1,081Sunk2 May 1918Thorsa1,319Sunk3 May 1918Vasilefs Georgios3,651Sunk10 June 1918Borg2,111Sunk11 June 1918Lorle2,686Sunk12 June 1918Kul1,095Sunk11 July 1918Kong Guttorm731Sunk15 July 1918Cap Breton1,464Sunk15 July 1918Vendee892Sunk16 July 1918Lyndiane1,564Sunk21 July 1918Arvor961Sunk
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