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The goal of the Torpedo Vorhaltrechner Project is to describe the development of the torpedo fire control systems used on submarines. The project evolved from an attempt to create a description of the German torpedo data computer that was manufactured by the Siemens Company and used on German U-Boats, known as a Torpedo Vorhaltrechner. Many incomplete and often inconsistent descriptions of this device can be found in books and on the Internet .

During my research into this equipment I discovered the full scope of the torpedo fire control problem. For that reason, aside from a description of the German torpedo data computer, this project includes descriptions of similar American, British and Japanese devices as well as the history of the development of such systems - from the beginning of the torpedo weapon’s existence to modern times.

This site was created with the help of Ken Dunn.

http://www.tvre.org/en/torpedo-attacks-during-wwi

everything the uboot commander needs to know