At what point do the escorts get down right nasty?

[GoldenRivet]

by 1943 - 44 the escorts almost always travel in packs of at least 2 or 3... if escorting a convoy i have seen 6 or 8 of them.

they will take turns listening for you on hydrophones while the others ping you and do depth charge and hedgehog runs against you.

you stand a 90% chance of death at their hands after 1943 no matter what you do.

the war is over for the u-boats after 1943 fades into 1944.

you should no longer hunt convoys and instead turn your sights on targets of opportunity (ie. single merchants)

the highest expression of their team work is one will set silent and listen to where you are going, while the others use asdic to attack you with depth charges and hedgehogs... they will also call in PT boats, planes and other area assets to assist in your sinking.

if they lose contact with you, the planes will patrol with radar and watch for periscopes, snorkels or for you to surface at which point they all turn around and start the attack again.

this is especially sickening if you get pinned down by a hunter killer group