I don't dive but I do have a dive recovery story.
A local county deputy was out in Puget Sound crabbing. As he was pulling up a pot, his Kahr MK9 pistol and clip on inside the pants holster fell over the side, kerplunk!. Well apparently he's a techy guy so he whips out his GPS and locks the coordinates.
He then contacts one of my detectives who is an very avid diver along with a couple officers who also dive.
They downloaded his GPS to his and about 45 days later they went looking for it.
They took another guy to stay with the boat and two went down. Took them less than 2 minutes to find it, wasn't terrible deep like 50 feet or so. Still in the holster.
Wise thinkers that they were they brought it up and it went right into a bucket of outdrive oil so it never really was in the air.
They brought it to me and I took it all apart and cleaned it up. Then got to pondering about springs and such, so I sent it to Kahr.
They commended my clean up efforts and replaced all the springs and questionable parts, returned it in a new box with a new magazine no charge. NICE?
Well the deputy felt so dumb he didn't want it back so it's kind of a pass around but ultimately belongs to the detective.
Anyhow they all took turns at various times and nobody could hit anything with it, so it came back to me and I tried it.
Couldn't hit a paper plate at 5 ft? Aim at the right, barely wing the left side, thought sights are off but couldn't hit it again.
So I called Kahr and told them I wanted to buy a new barrel, had to be bad. They sent me a new one free of charge??? I even told them what the deal was, certainly not warranty ya know?
Well the salt must have messed with the polygonal rifling, with the new barrel it's a tack driver.