SM UB-68 [SEP] vessel class
SM UB-68
SM "UB-68" was a German Type UB III submarine or U-boat in the German Imperial Navy () during World War I. The U-boat was ordered on 20 May 1916. She was commissioned into the German Imperial Navy on 5 October 1917 as SM "UB-68". The submarine conducted five patrols and sank five ships during the war. Under the command of Karl Dönitz, on 4 October 1918 "UB-68" encountered technical problems and had to surface where she was sunk by gunfire at .
with a deck-mounted machine gun. "UB-13" was broken into sections and shipped by rail to Antwerp for reassembly. She was launched in March 1915 and commissioned as SM "UB-13" in April.
"UB-13" spent her entire career in the Flanders Flotilla and sank 11 merchant ships, about half of them British fishing vessels. In March 1916, "UB-13" was responsible for sinking the Dutch ocean liner , raising the ire of the Dutch public. "Tubantia" was the largest neutral vessel sunk during