HMS E50
 HMS E50 was a British E class submarine built by John Brown Clydebank. She was laid down on 14 November 1916 and was commissioned on 23 January 1917.HMS E50 was damaged in a collision while submerged on 19 March 1917 off the North Hinder Light Vessel with U-Boat UC-62.HMS E50 was finally mined off the South Dogger Light Vessel on 31 January 1918.