Aside from slipping on it, and then over the side, the ice unbalances the boat. As you said, the submerged parts wouldn't ice up so bad, but the Turm may ice over bad enough to raise the center of gravity high enough to roll the boat. Even modern ships have this problem.

Just read somewhere (Either in Blair or the 564 book i linked in the campaign thread) that the biggest problem (along with mentioned above) was the diesel exhaust valves not sealing on dives, causing severe flooding and damage to the engines.

Here you go:

http://www.filefront.com/17734885/Sh..._Type_VII.rar/

^
Agreed. I've watched the program "Deadlest Catch" on t.v. which is about men fishing in the Bearing Sea. A captain spoke about the danger of rolling the top-heavy boat, laden with crab pots, if too much ice accumulated on the boat. Doesn't a u-boat have a low center-of-gravity to prevent this sort of thing?

They do, but enough ice will shift it upwards.

Submarines have a low reserve of buoyancy anyway, compared to surface ships. The biggest danger is at diving when, because of neutral buoyancy, they can be easily rolled over, and ice on the superstructure could increase this risk.The higher up the weight the greater the rolling moment and if the downward force exerted by the roll moves outside the righting moment pushing up, ie, outside the hull, the hull will capsize.Similar to the leaning tower of Pisa which will fall if and when the downward force moves outside the base.I believe they used to dive frequently in order to remove ice build up.
R.R.

Thanks a million. Fubar's winter skin is nice but too subtle. This one had always been a favorite to use while operating in the arctic/high North Atlantic.

You guys might want to look at post #14.

Your welcome.

Never seen this....any good?