I often wondered how I could tuck in something small and compact to make a fire to carry with me when scuba diving. I was imagining a scenario where the dive boat would have disappeared when me and my buddy surfaced. The best thing I could come up with was a mag bar encased in some sort of epoxy or plastic. I never did actually try to implement that idea. I would imagine that something like a peanut lighter will eventually fail under the stress of repeated compression/decompression cycles, but until that occurs, one would be fabulous.

I did actually come up from a dive once to find our boat nowhere in sight. We were in two groups of three and we huddled up, bobbing in the water, drifting lazily toward Santa Rosa Island, a quarter mile away. After about thirty minutes, our boat reappeared. It had been called away on very urgent, brief business.