What does it mean, "on a three"?
Mike calls for help when his partner detective Mike got shot down:
Mike: Three-fifteen. Shots fired. Officer down. Jose Marti Park. We need Air One on a three.
What does it mean, "on a three"?
Best Answer
He's talking about a "Code 3". In the US, a Code 3 means to respond with lights and sirens.
He's also asking for Air One backup, which is (as it sounds) support by air in the form of a helicopter.
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