Longest submerged patrol
Last updated: September 18, 2017 at 4:27 am
111 days – The longest known submerged patrol was done by HMS Warspite (1982-83) in the South Atlantic. During that time the submarine covered the distance of 30,804 nautical miles (57,085 km). The Commanding Officer reportedly missed his wedding by a week as a result of the extended patrol.