Radio systems

UHF radio
UHF Citizen’s Band (CB) radios are commonly used by farmers and other people in rural areas and will often provide better communication than a mobile phone. While still restricted to line of sight usage, the effective coverage is dramatically increased by the use of a simple repeater network. Repeaters are generally sited in high locations and work by receiving on one channel and transmitting on another. Channels 1–8 are set aside for repeater use; Channel 5 is reserved for emergency use. Handheld units are available.

VHF (Very High Frequency) CB radio
Commonly used by truck drivers and four-wheel drive users, hand-held CB radios are limited by power restraints, antenna size and the lack of a repeater network. It is sometimes possible to skip (or bounce) signals off the ionosphere over very long distances, but this is not reliable especially with a hand-held unit.

VHF trunk radio
These are repeater networks used by emergency services and government departments which can provide very good coverage and access to the telephone network. A trunk radio is quite expensive but may be a viable option for groups who can justify the expense and require a reliable system with good coverage.