[HEMISENT]

With randomized Sabotage & Malfunctions a test crash dive is now pretty much a necessity to avoid surprises when you least expect them.
Should Commander choose to issue a loaded file some of the areas of concern are:
Crash Dive depth
Crash Dive time
Diesel & E motor performance
Fuel consumption
Battery endurance
Various Schnorkel and Periscope problems
Turn Radius

You may get a single problem to deal with or a combination. Depends on the year and boat. Make the test dive-