HMS E50 was a British E-class submarine built by John Brown, Clydebank.

E 50 was lost on 1 February 1918, and it was earlier believed that she struck a mine in the North Sea off the South Dogger Light Vessel.

British E-class submarines had fuel capacities of 50 long tons (51 t) of diesel and ranges of 3,255 miles (5,238 km; 2,829 nmi) when travelling at 10 knots (19 km/h; 12 mph).

E50 was armed with a 12-pounder 76 mm (3.0 in) QF gun mounted forward of the conning tower.

The Danish team decided to raise the remnants in order to prevent complete destruction, and could do so in compliance with international law.