One thing I did not mention is that I usually carry mine in a twist wrap plastic bag which keeps water away from it in any sort of normal dunking situation - anything short of taking the lighter scuba diving. While I like the windmill fine and I have lit fires at elevaions up to 12,000 feet just fine, I would never depend upon it totally.<br><br>When you look at cost effectiveness, there is a lot to be said for a bunch of disposables tucked away everywhere.<br><br>In my scuba days, I often thought about a scenario in which I would come up from a dive around the Channel Islands with no boat in sight and have to swim about a mile or so to get to the beach. What kind of PSK should one carry diving that would serve in that sort of situation? About the only thing that I could come up with that would work for fire was a magnesium rod, although I should have taken a page from Mac Muz's book and considered a bow drill. One could probably be improvised from material found on the typical beach..