|Shipyard||Vulcan, Hamburg (Werk 83)|
|Ordered||12 Jan 1916|
|Launched||8 Dec 1916|
|Commissioned||10 Jan 1917|
|Successes||1 ship damaged with a total of 1,481 tons.|
1 warship sunk with a total of 350 tons. (View ships hit by UC 78)
9 May 1918 - Rammed by steamer Queen Alexandra west of Cherbourg at 49°49’N, 01°40’W. 29 dead (all hands lost).|
For many years, UB 78 was thought to be the submarine sunk by Queen Alexandra. The discovery of the wreck of UB 78 off Folkestone leaves UC 78 as the only possible U-boat that the Queen Alexandra could have rammed.
Previously recorded fate
Lost on a mine in the Strait of Dover on May 2, 1918. No U-boat was sunk or damaged in this location on this date.