He means enroute and on scene.
I have only Repeater 2 programmed in my scanner. I can barely hear them with the antenna setup I have
now but years ago when I could hear them with a better antenna setup, I determined Repeater 2 was
what I should listen to.
I've been listening when I can to Repeater 2 but they aren't a busy department so right now I can't confirm
that Repeater 2 is their response repeater.
If/When I have an update, I'll post another reply.