OK, after the deep water test, it yielded the same results, bearly any action was taken, the German destroyers made no attempt, they just performed what looked like an attack pattern, but they dropped no depth charges, I am beginning to think that the German and Italian destroyers either only have a passive hydrophone or that they are not programmed properly.
From what I have seen the German Destroyers just stop and idle when an enemy is near.
Even the Montecuccoli Light Cruiser made more attempts than the German Destroyer, They Cruiser made a single pass, it was interesting to see a Cruiser depth charge a submarine though
Generally, they seem to avoid the submarines, but once enough destroyers were sunk it decided to come in, once, then it fled, to hang around the out side of the group.