[Heibges]

I agree, in that I have evaded many times staying at pd, silent running, speed 1 kt, and cruised right out the back of the convoy. Plus staying at PD, I can use the periscope to really see what is going on.

177.) "If the submarine remains at PD after the attack, it will have the advantage of being able to observe the methods and extent of the enemy counteraction, besides finding fresh opportunities to attack. In this way the submarine is also enabled to discover gaps in the pursuing forces of the enemy.

I would always rather stay silent at PD, but if I have to dive because I think the escorts have detected me, I don't want to be caught slow and blind at an unsafe depth.

The analogy I always think of is the depth between 13m and 175m, is the the area between the serviceline and the baseline in tennis: no man's land.

And the best chance you have of getting killed by DC's in SH3, as in real life, is that first drop after you have fired your torpedos. Of course much or this is determined by escort location at the time of your attack.