This is the current UHF frequency usage chart if you’re looking for a free channel or just don’t know what each channel is for. CB radios can be a lifesaver if the mobile and internet networks go down and are therefore an invaluable resource to preppers. On flat ground the signal can reach around 5kms (3.1 mi) using about 5 watts of transmitting power.
General chat channels are used in simplex mode, repeater channels must be used in duplex mode.
If you are not using a repeater, it is recommended to choose a “general chat” channel.
| Channel | Purpose | Frequency |
| 1 | Repeater Channel – Transmitted from Channel 31 | 476.4250 |
| 2 | Repeater Channel – Transmitted from Channel 32 | 476.4500 |
| 3 | Repeater Channel – Transmitted from Channel 33 | 476.4750 |
| 4 | Repeater Channel – Transmitted from Channel 34 | 476.5000 |
| 5 | Emergency Repeater Output – Transmitted from Channel 35 | 476.5250 |
| 6 | Repeater Channel – Transmitted from Channel 36 | 476.5500 |
| 7 | Repeater Channel – Transmitted from Channel 37 | 476.5750 |
| 8 | Repeater Channel – Transmitted from Channel 38 | 476.6000 |
| 9 | General Chat Channel | 476.6250 |
| 10 | 4WD Clubs or Convoys and National Parks | 476.6250 |
| 11 | Call Establishment Channel | 476.7000 |
| 12 | General Chat Channel | 476.7000 |
| 13 | General Chat Channel | 476.7250 |
| 14 | General Chat Channel | 476.7500 |
| 15 | General Chat Channel | 476.7750 |
| 16 | General Chat Channel | 476.8000 |
| 17 | General Chat Channel | 476.8250 |
| 18 | Caravanners and Campers Convoy Channel | 476.8500 |
| 19 | General Chat Channel | 476.8750 |
| 20 | General Chat Channel | 476.9000 |
| 21 | General Chat Channel | 476.9250 |
| 22 | Telemetry and Telecommand Only (No Voice or Data) | 476.9500 |
| 23 | Telemetry and Telecommand Only (No Voice or Data) | 476.9750 |
| 24 | General Chat Channel | 477.0000 |
| 25 | General Chat Channel | 477.0250 |
| 26 | General Chat Channel | 477.0500 |
| 27 | General Chat Channel | 477.0750 |
| 28 | General Chat Channel | 477.1000 |
| 29 | Road Safety Channel (Pacific Hwy between Brisbane and Sydney) | 477.1250 |
| 30 | General Chat Channel | 477.1500 |
| 31 | Repeater Input – Broadcaststo Channel 1 (w/Duplex Enabled) | 477.1750 |
| 32 | Repeater Input – Broadcaststo Channel 2 (w/Duplex Enabled) | 477.2000 |
| 33 | Repeater Input – Broadcaststo Channel 3 (w/Duplex Enabled) | 477.2250 |
| 34 | Repeater Input – Broadcaststo Channel 4 (w/Duplex Enabled) | 477.2500 |
| 35 | Emergency Repeater Input – Broadcasts to Channel 5 (w/Duplex Enabled) | 477.2750 |
| 36 | Repeater Input – Broadcaststo Channel 6 (w/Duplex Enabled) | 477.3000 |
| 37 | Repeater Input – Broadcaststo Channel 7 (w/Duplex Enabled) | 477.3250 |
| 38 | Repeater Input – Broadcaststo Channel 8 (w/Duplex Enabled) | 477.3500 |
| 39 | General Chat Channel | 477.3750 |
| 40 | Road Safety Channel Australia Wide | 477.4000 |
| 41 | Repeater Channel – Transmitted from Channel 71 | 476.4375 |
| 42 | Repeater Channel – Transmitted from Channel 72 | 476.4625 |
| 43 | Repeater Channel – Transmitted from Channel 73 | 476.4875 |
| 44 | Repeater Channel – Transmitted from Channel 74 | 476.5125 |
| 45 | Repeater Channel – Transmitted from Channel 75 | 476.5375 |
| 46 | Repeater Channel – Transmitted from Channel 76 | 476.5625 |
| 47 | Repeater Channel – Transmitted from Channel 77 | 476.5875 |
| 48 | Repeater Channel – Transmitted from Channel 78 | 476.6125 |
| 49 | General Chat Channel | 476.6375 |
| 50 | General Chat Channel | 476.6625 |
| 51 | General Chat Channel | 476.6875 |
| 52 | General Chat Channel | 476.7125 |
| 53 | General Chat Channel | 476.7375 |
| 54 | General Chat Channel | 476.7625 |
| 55 | General Chat Channel | 476.7875 |
| 56 | General Chat Channel | 476.8125 |
| 57 | General Chat Channel | 476.8375 |
| 58 | General Chat Channel | 476.8625 |
| 59 | General Chat Channel | 476.8875 |
| 60 | General Chat Channel | 476.9125 |
| 61 | Reserved for Future Expansion | |
| 62 | Reserved for Future Expansion | |
| 63 | Reserved for Future Expansion | |
| 64 | General Chat Channel | 477.0125 |
| 65 | General Chat Channel | 477.0375 |
| 66 | General Chat Channel | 477.0625 |
| 67 | General Chat Channel | 477.0875 |
| 68 | General Chat Channel | 477.1125 |
| 69 | General Chat Channel | 477.1375 |
| 70 | General Chat Channel | 477.1625 |
| 71 | Repeater Input – Broadcasts to Channel 41 (w/Duplex Enabled) | 477.1875 |
| 72 | Repeater Input – Broadcasts to Channel 42 (w/Duplex Enabled) | 477.2125 |
| 73 | Repeater Input – Broadcasts to Channel 43 (w/Duplex Enabled) | 477.2375 |
| 74 | Repeater Input – Broadcasts to Channel 44 (w/Duplex Enabled) | 477.2625 |
| 75 | Repeater Input – Broadcasts to Channel 45 (w/Duplex Enabled) | 477.2875 |
| 76 | Repeater Input – Broadcasts to Channel 46 (w/Duplex Enabled) | 477.3125 |
| 77 | Repeater Input – Broadcasts to Channel 47 (w/Duplex Enabled) | 477.3375 |
| 78 | Repeater Input – Broadcasts to Channel 48 (w/Duplex Enabled) | 477.3625 |
| 79 | General Chat Channel | 477.3875 |
| 80 | General Chat Channel | 477.4125 |