Crash dive randomization ...

[CaliEs]

Originally Posted by Rubini

This reduces the normal crash dive routine only to a propability of 30% chance. Then a trouble crash dive with dive or engine problems at 60% with variable delay in time to dive and finally at 10% that a crash dive could be not possible at all and just a messy and slow dive routine could be done.

I doubt that the "30%", "60%" "10%" reflects the real life crash diving behaviour. Crash diving was a livesaving, essential task and therefore always on the crew's mind when the boat was surfaced.
I would sugggest 80 16 4 or something similar.