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CONTENTS By CHAPTER:

Capture of U-505 on 4 June 1944

German Navy U-Boat (Submarine) Headquarters War Logs From World War II in the Collection of the Navy Department Library

Recollections of Captain Daniel V. Gallery, USN, Concerning the Capture of German Submarine U-505

U-505 Photographs

German Submarine Crew Training During Construction, Outfitting, and Commissioning of U-boats:
Document Captured on U-505

U-505 Personal Diary - Anonymous author, possibly Oberfunkmaat (Signalman First Class) Gottfried Fischer

Radio Documents Captured on 
German Submarine U-505

U-505 Red Notebook

German Submarine U-106 Engineering Section War Diary Captured on U-505

U-107 Engineering Section War Diary
Captured on U-505

U-138 Engineering Section War Diary
Captured on U-505

Wehrmacht [German Armed Forces] Reports Captured on U-505

Glossary of German Terminology in Engineering Documents Captured on U-505

INTRODUCTION

On 4 June 1944, a hunter-killer group of the United States Navy captured the German submarine U-505. This event marked the first time a U.S. Navy vessel had captured an enemy vessel at sea since the nineteenth century. The action took place in the Atlantic Ocean, in Latitude 21-30N, Longitude 19-20W, about 150 miles off the coast of Rio De Oro, Africa. The American force was commanded by Captain Daniel V. Gallery, USN, and comprised the escort Carrier Guadalcanal (CVE-60) and five escort vessels under Commander Frederick S. Hall, USN: Pillsbury (DE-133) Pope DE-134), Flaherty (DE-135), Chatelain (DE-149), and Jenks (DE-665).

Alerted by American cryptanalysts, who--along with the British--had been decrypting the German naval code, the Guadalcanal task group knew U-boats were operating off the African coast near Cape Verde. They did not know the precise location, however, because the exact coordinates (latitude and longitude) in the message were encoded separately before being enciphered for transmission. By adding this regional information together with high-frequency direction finding fixes (HF/DF)--which tracked U-boats by radio transmissions--and air and surface reconnaissance, the Allies could narrow down a U-boat's location to a small area. The Guadalcanal task group intended to use all these methods to find and capture the next U-boat they encountered through the use of trained boarding parties.

The task group sailed from Norfolk, Virginia, on 15 May 1944 for an anti-submarine patrol near the Canary Islands. For two weeks they searched unsuccessfully, even steaming as far south as Freetown, Sierra Leone, in a vain effort to locate a U-boat. On Sunday, 4 June 1944, with fuel running low, the warships' reluctantly turned north and headed for Casablanca. Ironically, not ten minutes later at 1109 that morning, USS Chatelain (DE-149), Lieutenant Commander Dudley S. Knox, USNR, made sonar contact on an object just 800 yards away on her starboard bow. Guadalcanal immediately swung clear at top speed, desperately trying to avoid getting in the way, as Chatelain and the other escorts closed the position.

In the minutes required to identify the contact definitely as a submarine, however, Chatalain closed too rapidly and could not attack--as her depth charges would not sink fast enough to intercept the U-boat. The escort held her fire instead, opened range and setup a deliberate attack with her "hedgehog" (ahead-thrown depth charges which explode on contact only) battery. Regaining sonar contact after a momentary loss due to the short range, Chatelain passed beyond the submarine and swung around toward it to make a second attack with depth charges ...