What to look for when buying a GPS device
Choosing which GPS unit to buy depends on how you plan on using your GPS. The following qualities are usually very useful to GPS users, from cyclists to walkers to mountain rescue teams:
Since almost all GPS activities take place outside, a device that can handle general outdoor wear and tear is crucial. The Satmap Active GPS devices are both rated to IP65, which means they are dust proof and weather resistant. When using the ProSHIELD silicone case this rating is increased to IP67, providing total dust ingress protection, and immersion in water up to 1m depth for up to 30 minutes.
A large screen is important for outdoor or fast paced activities because it provides an excellent view of your surroundings and route ahead, even when moving quickly. Both Satmap Active GPS devices use a 3.5" (8.7cm) screen.
High resolution display
A high resolution screen is good for seeing all of the intricate details on maps, this is especially useful for walkers and geocachers. The Satmap Active 12 has a large, bright 3.5" Hi-Res HVGA screen, which has twice the pixels of the Active 10.
A barometric altimeter uses pressure to provide accurate altitude data. When calibrated, a barometric altimeter is accurate to less than 1 metre. The Satmap Active 12 has a built in barometric altimeter.