Fog is amazing

So i was playing stock silent hunter 3 whit 100% exept contact update and external view and i came across a convoy, so i intercepted it there was so much fog i could not see a thing but when i took a peek from the bridge a oil tanker right in front of me so i set up a gyroangle so that i would hit the weakest part where the oil is stored at least that is what i think i got the ship down instantly 10.000 tons then i saw 3 c2 cargo's i sunk all of them but while i was doing that a destroyer sneaked right behind me my crew was yelling that we were under attack but a quick torpedo shot right under the bow was enough to sink it the whole convoy gave me about 25.000 tons because i could not find another ship i sunk every ship whit 1 torpedo because i kept reloading my save until i hit the weak spot .

my english is very bad because i dont live in a country where people speak english