During the course of the war, Navy regulations required submarine Commanding Officers
to submit a report following each patrol. These patrol reports contained a summary of
the submarines daily activities and whereabouts, and included detailed information
concerning sightings of enemy planes and ships, weather and sea conditions, enemy
anti-submarine measures, own-ship material and personnel performance, and, of course,
attacks on enemy targets.
The reports were made available to all submarine commands and undoubtedly contributed
to the primary function of the submarine force - sending enemy ships to the bottom.
The following are the patrol reports of some of the 250 submarines that served in the
pacific during the war. They were transcribed from microfiche obtained from the National
Archives. To the extent possible the format of the original typed pages was duplicated
in the transcription. Some changes were necessary however, such has the use of lower case
"d" to indicate degrees, both temperature and bearing. The format of the reports varied
and typically became more detailed from 1943-1945. Most adhered to the following
outline form:
Prologue
Narrative
Weather
Tidal Information
Navigational Aids
Enemy Ships Sighted
Enemy Planes sighted
Summary of Attacks
Enemy A/S Measures
Major Defects
Communications
Health and Habitability
The reports were forwarded to higher authority where they were reviewed and attached with
letters of endorsement or comments. If the endorsements were transcribed, they are included at the end of the report.