I made a special mission in ME (just for trainining purposes), it is summer 1943, there is one veteran V&W, and me (VIIC, probably not equiped with anti-sonar coating). the DD is pretty close and has me tightly locked. I successfully evade his DC`s, but no way I can evade his pinging. I dove to 260 m (I cant get anywhere deeper, the boat starts to get damage under 260 m), I tried to change the course +-5, then +-10 degrees, then even +-90 degrees, I often changed the depth +-20m, then +-100m, I was launching decoys, tried silent running, engines off, running at full speed ... but everything was useless... the DD has always found me with his nasty pinging

turning stern or bow in his direction doesnt help at all. what is wrong? I dont want to submerge and get him with torpedo, I just want to learn how to evade. and yes, I have a good timing (silent running, then full speed when the DD drops the DCs, then silent running again etc). I am really desperate, it takes hours and I cant get rid of him...