Lightning
 

Standing on the bridge of my boat holding my breath beneath swells while my watch crew diligently scans the horizon in their magnetic boots; distant lighting plays across the sky. So...... how close can lightning come to my sub? And did real life subs have risks with lightning in storms? Was there a storm threshold that a real sub couldn't handle on the surface?

as a great kaleun once said: "don't fear, the sea can't claim us. No ship is as sea worthy as ours".
A sub, as any ship, is in danger of being hit by lightning, to keep the crew safe one should extend the periscope and atach a chain to it (and throw the other end overboard)... but i wouldn't risk a piece of equipment as important as the periscope, so maybe they just dove?
i've read about st. elmo's fire on U-boats, but that's as far as my knowledge about "natural electricity" goes, specially when related to the Ubootwaffe.

Why risk the periscope? Just tell bernard to stand on the UZO base, put a metal bucket on his head and attach that chain around his neck and throw the other end over board, he isn't as valuable as the periscope :lol:

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