stiebs
Contributor
Mike solved the computer/battery puzzle.
Gabe had an air integrated computer. The transmitter had the battery in upside down. This allowed his computer to keep depth, but it started beeping to indicate it wasn't getting a signal. So they went back to the boat and put the battery back in the right way and continued the dive.
That doesn't make him innocent. But that more than adequately explains why his computer beeped even though a battery was in upside down. He was talking about the transmitter battery.
I don't have an air-integrated computer, and have never looked very closely at them. But he apparently borrowed a coin (IIRC) to remove the battery cover. I know that many computer batteries can be replaced with a coin, but the transmitters that I've seen seem to require a screwdriver or spanner.