23
• Camping, fishing, and other sports
are more fun with a walkie talkie.
Locate a friend or find out “what’s
cooking” back at camp.
USING COMMON
10-CODES
Citizen’s band operators have largely
adopted the 10-codes for standard ques-
tions and answers. Their use permits fast-
er communication and better intelligibility
in noisy areas. 
This table lists the codes adopted by the
Associated Public Safety Communica-
tions Officers (APCO).
Code Meaning
10-1 Cannot understand your mes-
sage. 
10-2  Your signal is good.
10-3 Stop transmitting.
10-4 Message received and under-
stood.
10-5 Relay information to _________. 
10-6 I am 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 ___________ conditions.
10-14 Information.
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