If you're running GWX, your crush depth is already deeper than 150 meters. Your crew will tell you you're diving too deep but they're just scared
. You're also using SH3 Commander which makes your actual crush depth a variable--so you never know exactly where your fatal depth is. In practice, you can slowly push your boat deeper but when you start to hear bolts breaking and hissing you better bring it up a few meters or she'll go all the way to the bottom. Also note that damage sustained during a mission can weaken your hull integrity which also limits your depth until you put into port for repairs. These unknowns are a fine garnish to a fine game IMO.
