Recommended Specification

These are specialist handheld units designed for outdoor enthusiasts who need safe navigation in off road or marine environments.

There are a large range of units featuring special functions such as two way radio, heart rate monitors and barometric altimeters. The requirement for such functions is very much down to the user and the type of outdoor activities they pursue. The specification summarised below is for a good quality handheld unit without these specialist features.

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System
Processor Speed
System RAM

Memory Storage
Map Memory>

GPS Receiver

Maps
Display resolution

Touch Screen
Multimedia
Bluetooth

Batteries
Weight
Dimensions

Manufacturers Own
At least 300MHz
At least 68MB

Expandable up to 2GB (using SD memory cards)
Map loaded on to the unit via a SD Memory Card

In-Built (ideally a computer chipset)

Purchase maps by location
320 x 240, 3.5 inch screen

Yes
No
No

Rechargeables Li-Ion, at least 4hrs life
Less than 200g
120 x 80 x 20

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Further Useful Links:

Sat Nav Software & Map
Sat Nav Jargon Buster

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