Merchant chases during storms

[Saukko]

Originally Posted by Dievs

One another option is to surface, match his speed and trail him exactly in his wake, with the same speed and direction, and then just hit full reverse and fire a fast steam torpedo under him... but that's also hard to do.

I have used that a couple of times, distance can be even less than 300 meters because target is moving away from you, especially if you use slow torpedo. Magnetic torpedo under the screw, and it will stop eventually and then you can finish her.