At the end of each war patrol of WWII, submarine commanders wrote a report on the patrol. These reports were used as the raw material to inform intelligence, improve tactics, evaluate commanders, etc. During WWII, over 1,550 patrol reports containing approximately 63,000 pages were generated. The pages were photographed, and reproduced on microfilm, and later, in 2008, the microfilm was scanned into digital format.

The entire collection of WWII Submarine War Patrol Reports are now available on line via the HNSA web site. They may be found at WWII Submarine Patrol Reports.

Thanks to John Clear EMC (SS) USN (Ret) and Dan Martini EMCM(SS), USN (Ret) for their generous donation of the digital copies of those war patrol reports used to create the online version. Thanks also go out to the Naval Undersea Museum for loaning their microfilm copies of the war patrol reports for the project. Many of the original documents without any reproduction artifacts may be found at the US National Archives and Record Administration in College park, MD.

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