[Skurcey]

Here s how i do, but i m not very good in math, so if you could correct me if i'm wrong.

I engage a ship at a preferably 90°, i check his distance with stadimeter (Not sure if i need to make correspond the water line of ghost image with higher part of the ship (not mast) It seems correct but i have a 200 meters difference if i correct with map. I mark the ship on map

I wait a bit...

I remark the ship, reuse stadimeter, calculate the speed automaticly. (seems hard at long range to use stadimeter)

I trace a line on the ship course and plot an intercept point. I prepare distance. i enter the AoB by using the angle from starting point of ennemy to intercept point to my ship and i wait for the ship to come to the point and fire.

Seems correct but sometimes i miss, probably to false speed, i dont know