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Most outdoor activities in NZ sooner or later require a hand held GPS suitable for use in the bush – and fortunately getting a good signal under bush cover is now no longer limited to a few models - as it was 3 years ago, according to Christchurch outdoorsman Tony Savage.
Tony is the man behind Kiwi GPS, a local website which has become a byword for trampers looking for good information on GPS units.
As Consumer magazine reported (June 2009 - #492) you should treat your GPS as an aid . . . and you should still have basic map and compass reading skills.
But if you’re looking to buy a GPS unit to back up maps, Consumer reported the Garmin models performed consistently better. They were “all much easier to use and functioned better in wet conditions.”
Deciding Your Needs
Tony suggests giving “earlier models a miss as they will not have the high sensitivity antenna which is such a benefit. In the Garmin model range you'll need to look for an eTrex model with an H in the name or a 60 or 76 model with an x in the name.
“The new Oregon and Dakota models are also worth a close look - these all have colour and high sensitivity but not very good battery life.”
Things to look for when buying a hand held GPS unit:
Colour screen for displaying maps
Maps on a mono screens are hard to read - particularly topo maps as the tracks, contours, roads and creeks are all the same colour.
All the high sensitivity Garmin units (except the eTrex H) have colour screens.
Splash / rain proof casing
All the hand helds are regarded as rain proof – but don’t count on them surviving if you drop them in a stream.
Additional features like free maps, auto-routing to addresses – not essential but nice to have.
Specific Model Features
Tony comments:
“Though the entry level eTrex H (RRP$199) will give you a very good satellite signal it does not have maps or a colour screen and uses serial communication, and does not use USB for data delivery. (An issue as most laptops no longer have the connection for serial data.)
“Cables and software are extra with this unit but included with the others apart from the Dakota and Oregon.”
Being able to transfer data to the GPS from the computer is extremely handy for when you have more than 1 or 2 waypoints to store in the GPS. It's so much faster than manually inputting the coordinates and of course much less prone to error.
The Venture HC (RRP$399) is the next model up and if funds allow, is a far better value unit. It has the same high sensitivity antenna but with a colour screen and a map (though small) memory of 22MB built in. It uses USB communication and comes with a USB cable.
The Garmin MapSource CD is also included - this is the programme that is used for sending maps to the GPS and for transferring waypoints / Tracks to and fro.
Most Popular Unit: the 60CSx
Tony says by far the most popular model for hunters, trampers, pest control workers, forestry Contractors and SAR personnel is the 60CSx (RRP$599)
The C stands for Colour, S for Sensors (barometric plus electronic compass) and x for expandable memory (via the microSD card, there’s no user accessible internal map memory).
It's a high sensitivity unit which means you'll be very hard pressed to lose the satellite signal - it'll even work indoors if you're by a window.
Most people just leave them running while carrying in the back pack or pocket - so long as it's not under metal it will track your position well.
No longer is it necessary to carry an external antenna for bush work. Battery life is around 20 hours on 2AA's. High quality rechargeable is a good idea too.
For very cold snow conditions, use lithium AA batteries - they are quite expensive but will last ages and do not die like all the others with sub zero temperatures.
Tony is generous with his advice, willing to spend a lot of time discussing pros and cons of various units, and sells all these units at below RRP. You can reach him at (03) 3421302 or email KiwiGPS@paradise.net.nz
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