ADEC Marine - Marine Safety Specialists
sales, hire & service of marine safety equipment for commercial marine, fishermen, charter operators, leisure yachting
http://www.adecmarine.co.uk

GPS navagation suppliers
Over 500 GPS navagation products online. Read reviews on the very latest GPS products.
http://www.storesatellite.com

The GPS Primer
A tutorial explaining Geographic Positioning System (GPS) receivers in simple terms.
http://www.gpsprimer.net/