U-571

I would think that they were the same as any Naval Rifle. Most of the prevention would have been in port. Chip Paint, repaint etc. etc. . With standard PM while at sea.
 
Ok, paint. But surely it couldnt have all been down to that.

Many somebody in the navy can help out. What type of metal material could withstand periods of time submerged in salt water?
 
http://www.fleetsubmarine.com/guns.html

okay..this is as close to an explanation on what they did to make the steel guns survivable in a saltwater environment in the US Submarine service.

When it came to the smaller guns, it was simple: they just replaced the barrels.

Bigger ones were made of rust resistant steel, and guarded better against water intrusion.

smaller weapons were packed in pressure proof housings, where they could be employed quickly.

enjoy :D
 
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