Posted by Festeraeb on May 08, 2001 at 11:24:00:
I dive in michigan and am planning to do my first Deco dive this summer. We have a lot of nice recks her in the greatlakes but the really nice ones are at 130-170 fsw. I will be nitrox certified and the wreck we are doing is in 140 feet of water which is the maximum suggested limit for nitrox. Would you suggest doing this dive on air or nitrox. I am looking at about a 20 minute dive. with an extended deco to be safe. My thought was to do the dive on air and deco with nitrox. I have been on this wreck at 115 fsw for 10 minutes with no signs of norcosis. I guess I am just looking for any suggestions. I will be diving wet and the water should be wamred up to about 48-55 by that time depending on the summer. Thanks Thom