Sternhell Charles M., Thorndike Alan M. Antisubmarine Warfare in World War II

Washington: Operations Evaluation Group Office of The Chief of Naval Operations NAVY Department, 1946. — 193 p. OEG report No. 51.Manuscript and illustrations for this volume were prepared for publication by the Summary Reports Group of the Columbia University Division of War Research under contract OEMsr-1131 with the Office of Scientific Research and Development. This report was printed and bound by the Columbia University Press and was also issued as Volume 3 of Division 6 in the series of Summary Technical Reports of the National Defense Research Committee. It was originally published in duplicated form on 10 April, 1946, and was given wide distribution within the Navy Department. Distribution of this volume has been made by the Chief of Naval Operations. Inquiries concerning the availability and distribution of this report and microfilmed and other reference material should be addressed to the Office of the Chief of Naval Operations, Navy Department, Washington 25, D. C.First Period — Submerged Daylight Attacks on Independents, September 1939 - June 1940.
Second Period — Night Surfaced Attacks on Convoys, July 1940 - March 1941.
Third Period-Start of Wolf Packs; End-to-End Escort of Convoys, April 1941 - December 1941.
Fourth Period — Heavy Sinkings on East Coast of United States, January 1942 - September 1942.
5 Fifth Period — Large Wolf Packs Battle North Atlantic Convoys, October 1942 - June 1943.
Sixth Period — Aircraft Defeat U-Boats’ Attempted Come-Back and Force Adoption of Maximum Submergence, July 1943 - May 1944.
Seventh Period — Schnorchel U-Boats Operate in British Home Waters, June 1944- End of War Summary of Antisubmarine Warfare, World War II.
Antisubmarine measures and their effectiveness.
Safety of Independent Shipping Convoying and Escort of Shipping.
Attacks by Surface Craft.
Attacks by Aircraft.
Offensive Search.
Employment of Search Radar in Relation to Enemy Countermeasures.
Countermeasures to the German Acoustic Torpedo.
Epilogue.