Posted by CalAbDiver on July 18, 2001 at 13:46:46:
In Reply to: NDL limits without using a computer... posted by MHK on July 18, 2001 at 13:39:53:
that was before dive computers. i still do that out of habit, in case my dive computer breaks. plus its a good nark test. if you cant think or remember anymore, then its time to egress to one-half your deepest depth and hang out there for 3 minutes until you can think again.