Excellent idea TeacherRO. The more I think about it, the more I realize how many things promoted as "Survival" equipment or even bad idea that continue to be promoted in the now daily deluge of "Survival books" by people no one recognize save their parents.

As an example, in a recent "SOS, Would you survive" show by Creek Stewart (who seems to be a good reference) was considering a summer desert survival situation and made the proverbial solar still. . He only got sand for his effort, HOWEVER he made no mention of placing shredded or broken cactus, or other greenery in the pit before sealing. (how much water COULD he have obtained?) Granted, solar stills are generally not worth the effort, but even urine would distill back to potable water.

or, what are the survival rates of people who carry 3 to 5 thin mylar blankets, vs the heavier duty versions?

Much needs to be done on equipment, techniques and use of equipment by trained vs. untrained personnel.

Thoughts anyone?