Underwater Welding

[Bob]

Today I actually saw 10 rain drops ... this is a big deal here because it has been very dry this year.

I got to wondering about emergency welding in heavy rain, and even welding underwater. I know it is done. Salt water, in particular, is fair conductive; seems it would short everything out.

Just in case, this is a knowledge question, I am not planning any welding in the rain. Just wondering how it might be done, without electrocuting the weldor. Also seems like the rapid heat, then cool would make a very hard/brittle result.

Bob