[Paul Riley]

I have found the speed to be absolutely critical when it comes to getting your solutions right,make an error of just 1 knot and the torpedo could pass the ship fore or aft quite harmlessly,and the problem is even more confounded in rough seas where a ship's speed changes sometimes quite dramatically,in which case you will need to make an average based on your plot markings and/or fixed line observations.A zero degree bow on shot would be needed where speed is a problem,allowing the torpedo to come out straight with no angle.