Communications
The Mountain Radio Service (MRS) is one of the most reliable forms of two-way communication in the backcountry, as cell phone coverage can be minimal.
The MRS has lightweight radios which are ideal for hunters. You cannot buy a mountain radio - it is a hired service. The radios function in both the North and South Islands.
Satellite phones can provide near global phone coverage by connecting to orbiting satellites rather than land based sites. Using either geosynchronous or low earth orbit systems, they can almost guarantee contact with the outside world when you are out in the hills.
Personal locator beacons (PLBs)
Personal locator beacons (PLBs) are designed mainly for trampers and hunters, and are small enough to fit in your pocket. Once activated, the signal is picked up by satellite and/or aircraft, then the message is relayed and the beacon's position calculated.
PLBs use the UHF 406MHz frequency, and a PLB that is GPS equipped will cut down the time it takes for you to be found. Keep your PLB in a place you remember and where it is easily accessible. Talk to your local Visitor Centre about where to rent or buy a PLB for your next trip.
As with the PLBs and the MRS, check at the local DOC Visitor Centre for the best place to rent a satellite phone.