I guess I really should have asked this first - who did you dive with before, how long were your dives and what tank were you using?
if you’re new and on a big cattle boat staying with the group and doing 45 minute or less dives then maybe air is kosher otherwise
Your dives will more than likely be 80-100 for the first and 60-80 for the second. You absolutely can blow your ndl even with an average sac rate on the first dive using air.
Your computer uses Buhlmann so it’s not as harsh on you for second dives but I’d still use nitrox for both dives - 32 first dive and 36 second. Cozumel diving is just a little bit more aggressive with depths - add some safety.
Who are you diving with?
if you’re new and on a big cattle boat staying with the group and doing 45 minute or less dives then maybe air is kosher otherwise
Your dives will more than likely be 80-100 for the first and 60-80 for the second. You absolutely can blow your ndl even with an average sac rate on the first dive using air.
Your computer uses Buhlmann so it’s not as harsh on you for second dives but I’d still use nitrox for both dives - 32 first dive and 36 second. Cozumel diving is just a little bit more aggressive with depths - add some safety.
Who are you diving with?