I'm far from an expert, but it sounded like sting, and it was in reference to the aircraft type would be my guess, and sting-1 is most likely the flight lead, and sting-3 was the guy that had to go back. My GUESS (and I would love to be corrected on this) is that they got sting from 16 being said, and sting sounds pretty close to that. But that is just a guess.
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