Diving the Mall of America! (MOA)

[Punky]

From what I gathered listening to our guides and reading the dive evaluation at the end, there are two factors for length of dive, #1 being air. You only get one tank for both dives so we had to have 1500 psi left for the second dive. I believe I had 1750 left so the first dive could have gone longer. The 2nd being diver enjoyment. When the divers start showing signs of losing interest they start to end the dive to so nobody gets bored thus ending on a positive note. They want you to enjoy yourself (and maybe even learn something ??? if only by accident) so you'll come back and recomend the dive to friends.