In the glorious SHIII days i used SHIII Commander to launch the game which randomized crush depth with every launch, so you never really knew how deep you could go without being smushed like a grape.
in Uboat, the game has a much more dynamic approach to this IMHO
ive been so deep that my depth gauge didnt really indicate a value, it just pointed down past the end of the red band. But when you go below test depth and into the red band on the depth gauge in Uboat, things get interesting.
Hatches take water, tubes leak, pipes rupture, which are all random and of course another thing not simulated by SHIII was pump effectiveness, which Uboat does take into account. go deep enough, and i dont care how much you run the pump it simply cannot overcome the sea pressure beyond a certain depth and the water in your boat will go nowhere and all of your men are doomed to suffocation. evetually.
to your question; I usually give 150 meters a shot at evasion, then 180, then 200, then i flirt with 220 if i must but rarely deeper.
Leading up to mid 1942, most of my attacks are conducted from the surface at night.
the leading cause of my demise in Uboat has not been depth charges from escorts, (though they are dangerous) but rather bombs/depth charges dropped from airplanes. it will be interesting to see how things change when additional escort types and additional anti submarine weapons like the hedgehog are introduced. and dont even consider the addition of british subs patrolling the bay of biscay or off the north sea that could easily stalk and torpedo you! ive been torpedoed by a PT boat off the Southampton area and it didnt go well.
aircraft are all too often sighted too late to completely evade, crash diving if done properly takes 30-35 seconds and with an aircraft barrelling down on you at 200 mph thats an eternity
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