i never had problem with DDs after i used the ,,wasserbomben'' wich can be found in the stormys sound mod collection.
i try all the time to fire my torpedo as far as posible from an convoy heavy escorted... before my torpedo hit the target i order deept 80 metters , i change course and i order flank speed
after my first torp hit the target i order silent running and i order an speed of 0.8 knots
if the escorts detect me than i do like this:
1) when the escort is start to drop the first dept charges in water my sonar guy will screeam ,,waserbomben'' - this mean bomb in water... each time when an dept charges is drop the navigator annonce me
so first time when i hear ,,waserbomben'' means that the DD is very close to me position and he can not hear me because of all the noise from underwater (dept charges splash and explosion and his engines):
1) i start the cronometer
2) i increase depth with 20 meters
3)i order flank speed
4)i order amid ship
5)i count exactly 45 seconds - after that time usually the last depth charges exploded
6)i order 15 degree to port or staboard (depend of situation)
7)i order sillent running and change speed for 0.8 knots
if the DD still detect me after i repet again the steps 1-7 until i hit 200 meters dept and after that i start to increase until at 80 metters and so one
i play this mouse and cat untill the DD lose my tracks
if i spot an convoy with not so manny escorts... i go close to convoy... i fire my torpedos and i exacape under the convoy to the other side... if DDs spot me than i do my 1-7 steps
now for an situation when i am hunted by HK... (this i learned from TDW - i tryed and works like charm
)
i watch to see what DD is not moving... that DD is the one who use the asdic and detect my position no mater what i do - and report my position to others DD... i sunk that DD and after that i do my mouse and cat methode with the other until i exacape...
i do this ,,waserbomben'' methode from few weeks and i never had problems with DDs since then
I am using IRAI v30 and i have the defaults settings for it
regards