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Longest submarine patrol

Longest submarine patrol
Who
HM Submarine Warspite
Where
Not Applicable (South Atlantic)
When
15 March 1983
The longest submerged and unsupported patrol made public is 111 days (57,085 km 30,804 nautical miles) by HM Submarine Warspite (Cdr J. G. F. Cooke RN) in the South Atlantic from 25 November 1982 to 15 March 1983