Submarine Torpedo Data Computer Mark 3 Manual

Situated in the conning tower, the Torpedo Data Computer Mark III was the standard fire control device used by U.S. Navy submarines during the first half of WWII. An electro-mechanical, analog computer, the TDC provided fire control solutions through a variety of inputs, including submarine course and speed, estimated target course,speed and range, and torpedo type in use. Originally printed by the Arma Corporation and the U.S. Navy, this Mark 3 manual provides a fascinating glimpse inside this mechanical wonder. Please note, due to quality issues with the original document, some pages may be slightly sub-standard. Care has been taken to preserve the integrity of the original text.