Traveller (NSW) replied:

If you're starting oput - no such thing as a stupid question. We've all been there! Firstly - you may want to have a look at the "Topics" tab on this site - see Communications - lot of info there about various types of communication incl. UHF.
The repeaters are not an option on the radio unit - they're an external feature which effectively increase the range of your radio. There are thousands of repeaters located around the country. You only need to know where they are or how to find them. They operate on channels 1-8 and 31-38 on your radio - provided the unit is set to Duplex. All standard info contained in the user manuals. Bear in mind that UHF works primarily on "line of site" communication - great for communicating between vehicles (in convoy) and may be of use (for safety) if there's a repeater in the area. If your primary concern is safety you may want to consider HF radio or satphone. Buy your equipment from a comms specialist who is also willing to do some training with you.
Good luck.

MEMBER - Darian (SA) replied:

Even hand helds have the duplex function (for repeaters). You probably won't find an in-car unit without it. The GME brand is well respected. Just check when you decide on a model re the Duplex .......... and re "mainly for safety" ..... if you are going into remote areas, you should consider something with a "bit longer reach" than UHF - Satphone, HF etc. Have a good 'un.

Robin Miller replied:

Have a GME TX-4400 here , its an ok unit but a technically better unit is the IC400pro - a fully made in japan with mil shock and dust specs , currently selling around $385 in Melbourne

Robin Miller

SteveL replied:

Having a UHF,while useful for communicating on the road, will be pretty much useless should you need help in a remote area. I would seriously consider getting a HF radio if you really want to get help where ever you may be.