I did take a TAG Aquaracer Chrono on a single dive last trip last spring just to get a wristie. I should have known better because it was already up for a service due to low amplitude, and I had my doubts about a pusher gasket. I should have wet tested it but was in a hurry to pack.
Well, during the surface interval, sure enough, I looked down at it and saw the slightest fogging in the inside of the crystal.
But that wasn't my best move. Years ago we used to take our old phones overseas to give to the locals (laptops as well). I had a Samsung Galaxy Five, in great working order and was going to give it to our divemaster at the end of the trip.
Yeah, I figured I'd just take it out on a dive to get some boat shots.
So we were in San Pedro and the site was named "Tackle Box" after the bar it was straight out from. A spur and groove formation we swam down, then through a nice swim-through in a spur and finally through a groove that was overgrown and out into deep water (about '90). Sure enough, right when we cleared the groove, I remembered the phone, still in my pocket.
Not much I could do with it at the moment, but when we got back in the boat, the deckhand popped the back off, rinsed it in the camera bucket and said to buy a pound of uncooked rice to put it in. We never were able to get it to light up but it did ding and you could see the boot graphics faintly. I'm sure that water got into the 300V power supply for the backlight and blew it out. The DM later told me that he replaced the screen for $90 and continued using it for several years.
Now as for the Aquaracer, it got taken apart that afternoon and everything rinsed in fresh water so there's no damage to the dial or hands. It even runs though the reverser is frozen. Yeah, it was up for a service anyway.
