[TorpX]

Originally Posted by Tshark

How do I know I am in error by 2 knots? Well, I replayed the "Midway" quick mission about 10 to 15 times. Each time the Kongo BB plotted out to 16kts. The first half dozen attempts had my fish passing ahead of the ship (if they didn't prematurely explode). I dialed the speed down to 14kts and my torpedo tracks are looking good. I then went out on my first career patrol and got to track a lone merchant. The merchant plotted out to 6kts. Away go the fish and again they passed ahead of target.

With the stock game, or stock game physics, ships often will spot a torpedo, throw the rudder hard over, and slow down dramatically. Torps mostly miss ahead. It sounds like your speed estimates are ok to me.