How do you hunt in storms

[rishsin23]

I know I'm a bit late to the party, but playing at 64% realism, I make contact on map, now it's so rainy and stormy I could hardly see ship after ≈300 so what measures should I take when plotting, in a normal less calm weather plotting is easy as you will find the ship, but how to do in such storms and torpedo setting too, seems most of my shots dud whether magnetic or impact pistol? Thank you