i found the fcc id of theidive color it appears to have bluetooth but i don't see anything about syncing. Could it be for the transmitters?
I don't see why it couldn't be. Custom Bluetooth profiles on the computer and the transmitter. The hardware and physical (electromagnetic) transport shouldn't really matter.
But, I don't know anything about the actual output level of Bluetooth and whether it is powerful enough to meet the needs of RF underwater. Given its range on land, it seems like it probably could be used for dive computer <--> transmitter communication.