VKS737 is Commercial radio network run by the Australian 4WD Club consisting of 7 HF frequencies’s that subscribers can use to communicate with other VKS737 users or base stations throw out Australia. Each base station provides a number of services to users of the system the main one for VKS737 is a link between the Bases and The royal flying doctors service (RDFS) . To use the VKS737 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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