was a British H class submarine
built by William Beardmore and Company
. She was laid down on 23 January 1918
and was commissioned on 3 February 1920
HMS H50 was one of seven ships to survive to the end of World War Two. She was sold for scrapping in July 1945 in Troon.
- Submarines, War Beneath The Waves, From 1776 To The Present Day, by Robert Hutchinson.