The recent drop in retail prices for Sat Nav units has made these highly sophisticated navigation devices the "must have" accessory for car drivers, pedestrians and outdoor sports enthusiasts.

The range of units on offer primarily reflect the specific needs of users based around their method of travel. As with all new technologies, there is not one unit that suits all and already we are now seeing a crossover happening between navigation devices, hand held computers and mobile phones.

Select a type of Sat Nav Unit from below and find out more about how it may suit your personal navigation needs.

1. PDA Handheld GPS
These devices can be purchased as a complete Sat Nav unit or through an upgrade package as a a bundled kit that contains Navigation Software, a GPS receiver and a car mounting kit.

2. Dedicated Sat Nav Units
Most cars feature this type of unit as they have been disigned specifically for drivers. Some models provide further features such as speed gun detectors and inbuilt MP3 players to help improve your driving experience.

3. Smartphone GPS
Mobile phones continue to evolve and these types of Sat Nav devices are reliant on the phone operating system being powerful enough to run the navigation software and to process the GPS and mapping information.

4. Outdoor GPS Devices
These units range from portable handheld systems to watches that are aimed at specialist groups of users who generally navigate off road. Some units offer in-depth analysis of the the journeys they have undertaken.