I just recently purchased an Atom 1 dive computer and tried to set it up the other day, but couldn't get it to link up with the transmitter. I made sure the transmitter numbers match for TMT1, it was on and hooked up to a full tank. From the "Sea" screen I toggled to the status menu, which showed good battery life of the watch, but the TMT1 as unavailable. I got the watch wet to see if that would put it into dive mode and link up as well as started the flow of air from the tank through the regulator and still couldn't get it to link up. Another person in the dive shop I was in just purchased the same model and has an identical problem. Any ideas on the piece of the puzzle we may be missing? Any insight would be greatly appreciated.