Commemorates the Royal Navy submarine HMS Thetis, lost 1 June 1939 during a trial dive in Liverpool Bay. Of the 103 men aboard 99 died and only 4 survived. Thetis was salvaged, repaired, and commissioned as HMS Thunderbolt on 26 October 1940. On 14 March 1943 HMS Thunderbolt was sunk off Messina.
Approval Date: 1940-04-23
CGNDB ID: LAXWO