If you set yourself up at 90 degrees to the target's course & fire you torpedoes at zero gyro when the target is at the appropriate angle from your bow you can achieve some quite high hit rates. As noted by Hitman, range becomes irrelevant, so the only factors to consider are the speed of the target and the speed of your torpedo. All of that can be put into a simple table which can be consulted in a couple of seconds to give you the angle from your bow that the torpedo needs to be fired at (basic trig'). If you fire your first torpedo at low speed and the second at high speed you can achieve a Double Whammy.
Given that early TDCs could sometimes malfunction due to incorrect data input or mechanical / electrical problems, you can see some sense in the simple approach.
|