I just scored a 4 hit with my salvo - problem here is, that the carrier is speeding up on the begin. So if you stick with calculations from your WE, you miss guaranteed.
Here is how I did it:
1. Load the mission, set up your salvo/attack preferences - I suggest at least 2 eels, better make it all 4, spread 0-1 degree max - you have only one objective which counts, the carrier. Periscope up - turn to approx 270 degs, you will find your key objective there. Lock it.
Try to keep the periscope as close to waterline as you can, otherwise the near escort can spot it.
2. Let your WE calculate the distance, AoB and speed (or calculate it yourself, but I am not that good yet
). Following step needs to be VERY fast if you use WE calculations, so prepare for it mentally
3. Unlock, move your crosshair on begin of the carrier (where the notepad data is still automatically updated), then quickly switch to CTD and unlock manual setup - increase speed dial to 8,5-9 knots. WE sets it on 7 and you miss with that speed guaranteed.
4. DONīT return to periscope, DONīT switch back the manual control! OPEN THE TUBES with Q! and about 2-3 secs later, fire away. Donīt worry that the timer for eel impact wonīt show, you will hit the carrier - 3 eels impact sink it for sure, the 4th one is just for show.
Now if you need to get away, following needs to be set up, but immediately after the release of eels - do not watch the eels impact in periscope, or you wonīt get away.
5. Periscope down. DONīT FORGET!
6. rig for silent running, hit "D" for Dive.
7. full rudder starboard/port - you choose the way out
.
8. creep away at
1 knot set speed. The escorts donīt know you hit the carrier from about 3,5km far and are now making a run for it, and 1 knot is too slow for them to detect.
9. wait for the eel impact while already on your way somewhere safe
By the time of carrier happily on itīs way to Davy Jones locker, you are 40m deep and scurrying the opposite direction of the escorts.
10. get very, very far, get on surface, enjoy the completion