Bulkheads collapse event

[thedoctorking]

What are the conditions for this to happen? I just had a ship going 10 knots with no persistent flooding, they had just reduced flooding from earlier damage, and suddenly they had bulkheads collapse and a rapidly fatal amount of flooding. I thought the point of this event was to punish ships that tried to keep going at flank speed with damage below the waterline.

[WLRoo]

I always thought it was under 10 knots - i.e. 9kn or slower.

[mrchuck]

There seem to be various factors at play:

Speed--less than 9 is good, even less if damage is severe and you can get away with it
Age of ship
level of TP
damage control training. Not doing it? Why not?
Sea state
enemy torpedo/mine tech
Don't forget random.

I don't think you can entirely rule it out, ever.