Signals, unless you're working with rookies, should be saved for things where there are choices. Like, two man, R1. Okay, the IFF too.
But four man, nobody on, and U2 goes out is a no-brainer (or should be). I mean, what would you signal anyway?
When I work four man with an experienced crew, I'll know they have the basics down. Rotation and tag up coverage is pretty standard. If you're the PU, with bases loaded, and you're signaling that you're staying home, that's overkill.
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