11
Operation
This table lists codes adopted by the Associated Public Safety Communications
Officers (APCO)
Code
Meaning
10-1
Your signal is bad.
10-2
Your signal is good.
10-3
Stop transmitting.
10-4
Message was received and
understood.
10-5
Relay information to ___.
10-6
I am busy. OR Are you busy?
10-7
Out of Service.
10-8
In Service.
10-9
Repeat last message.
10-10
Negative (NO).
10-11
___ in service.
10-12
Stand by.
10-13
Report road / weather
conditions.
10-14
Information.
10-15
Message delivered.
10-16
Reply to message.
Code
Meaning
10-17
En route.
10-18
Urgent.
10-19
Contact ___.
10-20
What is your location?
10-21
Call ___ by telephone.
10-22
Cancel last message.
10-23
___ arrived at the scene.
10-24
___ assignment complete.
10-25
Meet ___.
10-26
Estimated time of arrival is ___.
10-30
Use caution.
10-31
Pick up.
10-33
Emergency traffic. Clear the
channel.
10-34
What time is it?
10-41
Switch to channel ___.
10-62
___ cannot understand.
Maximum Range
The maximum range and quality of CB transmissions vary depending on the
following conditions:
•
the type and quality of antenna used
•
the height of the antenna’s mounting location—the higher the antenna,
the better the signal’s range
•
the surrounding terrain—mountains and tall buildings limit the range
•
weather conditions
•
the number of nearby CBs operating on the same channel
•
standing wave ratio (SWR) between the antenna and the CB.
