Try to explain this!

[tomfon]

October 1944,North Atlantic,Type VIIC41.
I am in pursue of a convoy, instead a task force comes into view. I dive. I am in perfect position to torpedo the bogue class escort carrier. It sinks! The destroyers come after me and despite the damages i manage to finally slip away after almost 2 hours.
It was then when my sonarman reported contacts: port side, 270deg, convoy closing. What happens now is that the destroyers start pinging me! I was at 200meters running at silent mode, speed 2 knots but still, it wasn't enough for crying out loud!
Jesus! I had to face 3 destroyers and had no luck against those hedgehogs...

I know that GWX adds historical "weight" to SH3 and that it restores its realism level to its maximum but (i) the apparent ability of the destroyers to find a Uboat despite how deep it lies and (ii) the laser-guided hedgehog depth charges seem to be extra-ordinary aspects for me(at least for the time being).

Yes! I have read the manual: "Try to avoid task forces... Crew too experienced..."
"... if you simply lie in front of a convoy destroyers will find you..."

So, here we go. How realistic is for the destroyers being able to find a Uboat at 200meters when it is moving at 2 knots? Was this possible (and not probable) at that time?
Were the depth charges so accurate?

I don't know but staying alive after attacking a task force and being discovered by the convoys' escort destroyers despite the high stealth measures is too much for a veteran commander like my Kapitanleutnant...

I am just trying to understand how GWX works.

Nevertheless.............. LOCK AND LOLL & SINK'EM ALL