Well i was able to beat this one, so unless a patch changed something to make this impossible, it is very possible to beat. Just be really silent and if you get shot at you can outrun their torpedos at flank speed. by the time your aircraft is there it should be almost over for them. if not you can finish them off with the ASW aircraft.

All enemy subs have wider range better decoys and are almost double our numbers

tried 3 times and its quite impossible... Any advice? My noisemakers are useless while theirs are too overpowered