Historyically the German TDC was a basic computer. The captain called out AOB, course and estimated speed. He also called out the depth he wanted for the torpedos. Once put into the TDC it did all the figuring and sent this info via wire the torpedo. Hopefully the torpedo did not go off course, premeture, runout of fuel, or just not leave the tube period. Somehow they managed.
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“You're painfully alive in a drugged and dying culture.”
― Richard Yates, Revolutionary Road
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