I know a few of us use UHFs, so you might be interested in this:
UHF Radio Channel Allocation
Below you will find a list of UHF Radio channel allocations. There are many channels that have been established by law including the Emergency channel 5 and the data transmission channels 22 and 23.
* 1 to 8 - These channels, which are established by law, can be used when sending a signal to a repeater which will help increase the communication distance
* 5 - This channel, which is established by law, can be used by anyone but only in an emergency situation
* 9 - Used for conversations
* 10 - Used by 4WD enthusiasts, clubs, convoys and in national parks
* 11 - Calling channel. This channel, which is established by law, is used to call or locate another station. Parties will then switch to another channel to continue with their conversation
* 12 to 17 - Used for conversations
* 18 - Holiday maker’s communication channel (e.g. when in a convoy)
* 19 to 21 - Used for conversations
* 22 and 23 - These two channels are used for data transmissions and is established by law. Voice transmissions are not allowed on these two channels
* 24 to 30 - Used for conversations
* 29 - Highway Communications which are mainly used by truck drivers and other highway users
* 31 to 38 - These channels, which are established by law, are received by a repeater and re-transmitted on channels 1 to 8 to help increase the communication distance
* 35 - Can be used in case of Emergencies also
* 39 - Used for conversations
* 40 - Highway Communications which are mainly used by truck drivers and other highway users