O'Kane technique,observation.

[Arlo]

Originally Posted by jcope

While positioning the sub at close range helps overcome problems with inaccurate speed measurement, the range you put into the TDC is completely irrelevant. All you need is the angle.

Range in the TDC is a red herring. Either that, or I'm doing it wrong.

Edit: I could see range being important if it was input to a detonator timer or something like that. But the torpedoes just keep going until they hit something or they run out of power.

Range is important in so much as the speed setting you'll select for a MK 14 (which will determine it's intercept course). If I'm mis-measuring mast (or alternate height point) and getting 4k yards when it's really 7k yards, selecting a hi speed setting will make an accurate shot meaningless.

But this is just stating the obvious. Regarding accuracy, if you can see it then you can figure an angle, if the torp and target stay on track then range is till the juice runs out.