Blowing ballast ?
 

DO DD,S HEAR THE SUB BLOWING BALLAST , IN SILENT HUNTER 3 G.W.X 3.0 GOLD IN MULTIPLAY :hmmm: ?

I don't know; you might ask this question in the multi-play forum.

You can...
 

Surface and use only "S" to come up and not blow ballast its takes a bit longer time but this could help in many place.

Enemy ASW ships will hear you ALOT easier if you are not rigged for silent running. Blowing ballast is something you should not consider doing unless it's a last resort, as it was an emergency situation typically in connection with extreme damage your U-boat may have suffered.

The only noise that ASW ships cannot hear in the game for some reason, is when you do a depth check with your acoustic sonar.:yep:

Probalby thay can..

Almost everytime I used blow ballast (+ no engines and silent running mode) to came up at periscope depth quickly from 200m I was often detected (by pings!) by heading DDs..