HF OZ is a Commercial radio network consisting of 15 HF frequency’s that subscribers can use to communicate with other HF OZ users or base stations throw out Australia HF OZ also provides for a fee Email and GPS real time tracking over the network. Each base station provides a number of services to users of the system. To use the HF OZ system you must apply to the network operators for a permit to operate on the network, failure to do so is an offence. Each user is given a call sign in the form of a 4 digit number that indentifies them on the net work.

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