Scanners are the CCA's best friend. They can be used in places that are inhospitable or inaccessable for units, like District Six.
Authorizations
Scanners require OfC+ authorization to conduct an aerial patrol of the plaza. From my experience, here are the authorization you need for the different districts:
D1 (Plaza): OfC+
D2 (CWU): OfC+
D6 (Webuland): CmD+ or GRID DvL
Controls
R: Flash
LMB: Beep 1
RMB: Beep 2
Alt: Follow*
*Also gives you the char's name. You have to /me flashing them then use alt to get their name and run it through /viewdata
Behavior
DO NOT run around lolflashing citizens
DO NOT run around lolbeeping
DO NOT flag on your scanner without proper authorization
Scanners always talk over the radio in all caps. Example:
Dispatch radios "<:: SCN 441 REPORTS: AUDIO VIOLATION: CHANG WU. LOCATION: UCH STEPS."
Scanners never confront citizens, they only report things. If you see a citizen doing a crime, report it on the radio.=
One more advanced thing you can do is 'relay' your CCA character's voice over your scanner. Example:
C45.CCA.GRID-04.123 radios "<:: 441, sir, is it possible for you to train me?"
Dispatch radios "<:: UNIT 441 RELAYS: Not at the moment, 123. I am 10-6."
As a citizen
Don't grab a floating hunk of metal, k?
That's about it for scanners. Hope this guide helped.