elan
Contributor
Ahh yeah of course. Using the computer and an extra gague in different modes will of course be an issue. Should also be plainly visible and ring a bell if you have two units showing different depth tho
I think what he meant was using a personal computer like PC or a smart phone like iPhone on the surface which run software like v- planner to plan the dive. Not a dive computer. And then execute the dive using a gauge. In this case it is not very obvious.