I have difficulty remembering which UHF CB radio channel I should be using. Here is my handy list for 80 Channel UHF.

Duplex channels

Repeater output
1-8 (5 emergency use only)
41-48
Repeater channels press the DUPLEX button on your radio to use any available repeaters

Repeater input – do not use for simplex
31-38 (35 emergency use only)
71-78

Simplex channels

9-21
24-30
39-40
49-60
64-70
78-80

10 – 4WD drivers convoy, clubs & national parks
11 – Call channel
18 – Caravan & campers convoy channel
29 – Pacific Highway (NSW) & Bruce Highway (Qld) road channel
30 – UHF CB broadcasts
40 – Highway channel

Data only channels

22-23

Channels reserved for future expansion

61-63

Uniden UH037SX-2NB UHF handheld CB radios