HMS H43

HMS H43 was a British H class submarine built by Armstrong Whitworth, Newcastle Upon Tyne. She was laid down on 4 October 1917 and was commissioned on 25 November 1919.

HMS H43 was one of the seven H class submarine to survive to the end of World War II. HMS H43 was sold in November 1944 and was scrapped in Troon in 1945.