I would like to share my experience with my last convoy because it could help someone with TWOS.
nothing very special, but interesting...
I was in the point of deep waters just before Edinburg, my very favorite place in eastern coast of UK..
I was pretty low on morale, because i met just fishing boats this patrole, but right now on my periodic hydrophone check i heard convoy marching from somewhere of Norway Bergen.
Beno heard nothing, my crew where more down, than me and that was something...
It was absolutelly from 72 bearing which was very directly from Bergen, so it could be Norways, i started to 4b. method - noted bearing of sound.
After next 10m i checked again, but it was the same - 72.
I decided they were moving directly against me, because i have a lot of experienced from 4b method and always, always it was changing.
Our Hydrophone simply dont have a chance to hear signal which is so distant to not move in 10 minutes if it is not directly against you.
So i decided - hearen from 72 -> +180 = their course is 252.
You know i was wating for them and from RAOBF i found they was 256!
Which means the same, you are never exact from hydropphone, but this was so near, you would not need to move if you waould be prepared.
So i was just prepared for attack from north. I fired all 4 from my 7a and sunk 2.
Torpedoes settings was fast, magnetic pistol, depth 5,5m, because their draft was about 6m and there was 9kts wind, table about recomended minimum depth relevant to current wind is in table just above speed tables.
If you attack convoy, you can use they have the same course and at 90% even the same speed, so target just one, or two ships, one is enough, and then fire even all 4 torpedoes just with the same solution on 4 targets - it will work perfectly.
Convoy was unprotected and since i knew they were 6kts and i knew their course, i just moved bellow them by hydrophone, i set their course and continued next kms bellow them hidden from marching escorts.
I was lucky, because when my torpedoes started to explode, they turned in course whicih was very good for me - i was between their course and them, so i was given a chance to wait for them to join them from bellow...
This i never expected - Convoy noise hide me even when i was between convoy and arriving escorts, so i could use max speed and even load new torpedoes. They didn't notice me!!!
After maybe 1h, i left my route bellow convoy to the left (south) checking my distance from them by periscope and emerged far enough....
Attack continued after a while...
To be short, i was sunk, since i shadowed a conwoy, destroyer emerged before us and Depp said nothing, so we saw destroyer just 2kms before us and next was comming.
I was fighting whole night with their hydrophones (from saturday to sunday), but they were maybe more, than 4 above me.... after maybe 30 minutes when most of them were moving out, i decided its clear, opened a door between sound engineers and bridge and in that moment Johny Walker heard me - one of them was still waiting for me, totally quite to get me when i move... even after such long time...
They sunk me, it was clearly lost fight.
This is something i like good sim for. Sometimes, you have no chance at all.
