There is the same type of service in my area. It is basically insurance in the event that you need to be med-evac'ed out for any reason. Ie. If I was in my local ER with some heart issues that they would feel more comfortable with the GOOD heart center 80 miles west handling, they may send me via chopper, and I would be covered.
It's not just a pick you up from the boonies thing.
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Semper Fidelis
USMC '87-'93