SM U-103

In the early hours of 12 May 1918, the surfaced U-103 sighted Olympic, the older sister of RMS Titanic and HMHS Britannic, which was carrying U.S. troops to France. The crew prepared to launch torpedoes from her stern torpedo tubes but was unable to flood them in time before the submarine was spotted by Olympic, whose gunners opened fire as the transport ship turned to ram.

SM U-103 started to crash dive to 16 fathoms (96 ft; 29 m) in an attempt to turn to a parallel course to the liner. But there was not enough time before the bow of Olympic rammed the submarine, cutting into its pressure hull just aft of the conning tower. The crew of U-103 blew ballast tanks before scuttling their sinking submarine. Nine crewmen lost their lives. Olympic did not stop to pick up the survivors but continued on to Cherbourg. USS Davis later sighted a distress flare and took 35 survivors to Queenstown (now Cobh) in Ireland.^[4][5]

The remains of U-103 lie at a depth of 49 fathoms (294 ft; 90 m) in the English Channel about midway between England and France (49°16′N 4°51′W). Its deep location makes it largely inaccessible to divers but the wreck was surveyed and identified by a remotely operated underwater vehicle in 2012.^[6]

• Its sinking by the Olympic was shown in the opening of the film Operation Seawolf.^[8]

• U-boat Campaign (World War I)