The officers told me that they just use the Metro channel that's closest to the sector channel.
So Adam would be Metro 1
Baker would use Metro 2
Charlie would use Metro 3 or Metro 4
David would use Metro 5
Edward would use Metro 6 or Metro 7
Frank would use Metro 8 or Metro 9
George and Henry would use Metro 10
but that's not exact. If there is already one group using a Metro channel, they can always just use another one. The thought was to use a channel that is 1 or 2 clicks away from the patrol channel in case they need help.