I live about 20 minutes from the beach, but its somewhat steep so my house is at about 2500' elevation. Should I be concerned about driving home soon after getting out of the water? I've been told that it should be ok, but I've also read recommendations to stay lower than 1000' (or is it 500') after diving. I would love to spend 3-4 hours on the beach after every dive trip, but one of the drawbacks of living close to where you can dive means that sometimes you do have schedules to keep... So far I've assumed that if I don't push close to the NDL limit that I shouldn't have to worry much. However there have been a few dives where after I get home I'm unusually fatigued - which could also be due to the fact that I'm a new diver and don't have the best technique yet. I recently got a cobra2 computer and was thinking about using the altitude diving setting. I know its intended for lakes or whatever that are at elevation, but would it also work similarly for returning to a higher elevation after diving? The A1 setting is for 1000-5000 feet elevation which would certainly cover my trip home. Thoughts? Thanks for your help!