Deja vu again
Evading depth charges is a matter of speeding up when the escort starts its run (ASDIC pings stop and escort speed increases). In GWX changing depth by 20m or so also works (this is not realistic). SH3 escorts drop charges at the last known position even if they have no contact (in real life the chances of a hit in these circumstances were close to zero so it would only be done for scare effect to keep a boat down).
Game escorts go away after about 20-40 minutes of no contact. You need to work out when they actually have contact and whether you need to evade. Unfortunately GWX escorts rely primarily on passive sensors and only use ASDIC just before they attack. Every time you speed up you are likely to restart the clock.
Go deep. 200m should be fine in an undamaged boat but I find 160m is enough.
Be quiet. Silent running, 1 knot. If being loudly pinged you may as well speed up until the pinging stops in order to change your position but don't go above 1/3 ahead or you may pull other escorts in.
Against active sonar/ASDIC point bow or stern at the escort.
Do not make any noise again until the escort is at long range.
Watch Tonci87 or Wolfpack345 on Youtube for examples.
In real life late war escorts that could not get a kill directly would hang around for 24 hours until the boat's air ran out. Watch the film "The Cruel Sea"!
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