As an inducer for sparklers, we used to wrap the tip with a couple winds of cannon fuse. Worked like a champ.

One of them little boxes of saturn rockets (50 rounds that go off like whistling bottle rockets then end in a report) would be great for SAR once they got within a mile or so of ya.

It's a thought. It might not be worth the effort in some cases.
_________________________
The ultimate result of shielding men from the effects of folly is to fill the world with fools.
-- Herbert Spencer, English Philosopher (1820-1903)