Affirmative:
Yes or confirmation.
Negative:
No or disagreement.
Roger:
Message received and understood.
Code 1:
Routine call – no emergency.
Code 2:
Urgent call – no lights or sirens.
Code 3:
Emergency – use lights and sirens.
Code 4:
The situation is resolved – no further assistance is required.
Code 5:
The officer requires backup – urgent.
Code 6:
Ambulance required.
Code 7:
A fire brigade is needed.