June 9, 2011 12:39:01 AM EDT
I'm late to the party, but I travel quite a bit and here are my experiences with scuba gear in carry-ons:
Dive computers: Never a problem. Most of the time I treat them like a laptop and pull them out of the carry-on, but sometimes not.
Regulators: Not a problem anymore, TSA finally has finally learned what they are. For a few years after 9/11 they would always pull the regulator out of the carry-on and look it over, but they've gradually figured it out.
Camera housing: Always get inspected. My video housing is all aluminum (Amphibico) and shows up as a big black box on the x-ray so they almost always pull it aside and go through it. I think of the roughly two dozen trips I've taken the housing with only twice have they let it go without pulling it aside.
TSA seems much more concerned about liquids in carry-ons than they do with scuba gear.
I put everything else in checked baggage, only once have I had a problem with delayed bags and they were delivered in time for the next day's afternoon dives.
Wayne