Yesterday I performed my best blind kill (Without TDC, without RAOBF disc and without lockage... Just with mathematics

)

. Indeed, I was able to lock this aircraft carrier only at the last minute. But, using trigonometry calculations I managed to sink this aircraft carrier
Just with this simple formula:
Let x = 0.01 or 0.03.
Distance from submarine to target = Mast height / Tan (vertical mark + x)
@propbeanie thanks again. Now when I sink a boat, I see magnificent fireworks thanks to you

.
ps: sorry for your compatriot, he had the misfortune to cross my path...