Pritch, and others, exactly! I sincerely did not mean to start a pissing contest about minutes. My goal was to point out the priorities, IMO, required for long term survival. Shelter first, water second, then food. After that, plan how in hell are you going to survive long term? IMHO, the mountains and deserts of the west are NOT the ideal places for long term survival. There are no longer herds of buffalo, elk, etc., for 'convenient' meat. Therefore, move south! IMO, milder (southern) winters equate to fewer calories required to maintain body heat and survival. Also, southern forests and swamps with more varied animal and plant life equate to less foraging to survive. Hey, one + one equals two. No? Those survivors along the seaboard and in relatively resource rich southern forests/plains/croplands require less energy expenditure to survive which is a really big plus.
As for the 'deep divers' who go underwater for many minutes, I was part of that fraternity when ii began in the early 50s. You train like hell and also take in copious amounts of pure oxygen before going down. Been there, done that, and proved what? Exactly nothing! When you're super trained or souped up on oxygen you can dive longer than normal. So what? This has nothing to do with a survival situation.
My point was merely trying to point out the potential hazards of getting 'stuck' on the wrong priorities. Sorry if I POed some of you. I'll stop posting to this thread.