Used GPS TomTom, NavMan Sat Nav


You've come to the right place to buy a used GPS or used Sat Nav system. The GPS, typically named Global Positioning System and originally named NAVSTAR, is a satellite navigation system used for determining one's explicit location virtually anywhere on earth. A GPS unit receives time signal transmissions from assorted satellites, and generates its exact position by triangulating the information. Checkout our great deals and grab yourself a discount used GPS or used Sat Nav.

VIEW QUEST GUIDE3500UK 3.5" GPS SATELLITE NAVIGATION SYSTEM UK+ ROI


VIEW QUEST GUIDE3500UK 3.5" GPS SATELLITE NAVIGATION SYSTEM UK+ ROI

Price: £26.99

GPS Pouch Hard Case Black for Garmin Nuvi 650 660 750 920T 930T


GPS Pouch Hard Case Black for Garmin Nuvi 650 660 750 920T 930T

Price: £2.97

land rover sat nav screen--yik500022


land rover sat nav screen--yik500022

Price: £26.00

NAVIONICS GOLD XL9 31XG MSD CHART CARD - INDIAN O & S CHINA


NAVIONICS GOLD XL9 31XG MSD CHART CARD - INDIAN O & S CHINA

Price: £179.00

NAVIONICS PLATINUM+ XL3 60P+ AUSTRALIA N & W Chart MSD CARD


NAVIONICS PLATINUM+ XL3 60P+ AUSTRALIA N & W Chart MSD CARD

Price: £325.00

TomTom USB Car Charger 2A


TomTom USB Car Charger 2A

Price: £5.50

TomTom USB Car Charger 2A


TomTom USB Car Charger 2A

Price: £5.51

CASE COVER PROTECTOR HOLDER TO FIT GIZMONDO IN BLUE!!!


CASE COVER PROTECTOR HOLDER TO FIT GIZMONDO IN BLUE!!!

Price: £3.99

HARD COVER PROTECTOR HOLDER CASE FOR GPS IN PINK!


HARD COVER PROTECTOR HOLDER CASE FOR GPS IN PINK!

Price: £4.99

NAVIONICS PLATINUM+ XL 8P160XL MSD with SD ADAPTER - NEW ZEALAND


NAVIONICS PLATINUM+ XL 8P160XL MSD with SD ADAPTER - NEW ZEALAND

Price: £179.00

NAVIONICS GOLD XL9 2XG MSD CARD WITH SD ADAPTER - CANADA


NAVIONICS GOLD XL9 2XG MSD CARD WITH SD ADAPTER - CANADA

Price: £179.00

4.3" Touch Screen GPS Navigation FM MP3 4 FREE MAP 4GB


4.3" Touch Screen GPS Navigation FM MP3 4 FREE MAP 4GB

Price: £29.89

4.3" GPS Navigation FM MP3 4 Touch Screen FREE MAP 4GB


4.3" GPS Navigation FM MP3 4 Touch Screen FREE MAP 4GB

Price: £33.89

NAVIONICS PLATINUM+ XL3 61P+ AUSTRALIA SOUTH MSD CARD


NAVIONICS PLATINUM+ XL3 61P+ AUSTRALIA SOUTH  MSD CARD

Price: £325.00

4.3" CAR GPS NAVIGATION SYSTEM SAT NAV FM UK EU MAP NEW


4.3" CAR GPS NAVIGATION SYSTEM SAT NAV FM UK EU MAP NEW

Price: £55.55

4.3 Inch Touch Car GPS SAT NAV MP3 MP4 FREE EU MAP NEW


4.3 Inch Touch Car GPS SAT NAV MP3 MP4 FREE EU MAP NEW

Price: £55.55

NEW 4.3" Touch Screen GPS NAV FM MP3 4 FREE MAP THIN!!


NEW 4.3" Touch Screen GPS NAV FM MP3 4 FREE MAP THIN!!

Price: £55.55

NEW 4.3" Touch Screen GPS NAVIGATION MP3 MP4 EU MAP 2GB


NEW 4.3" Touch Screen GPS NAVIGATION MP3 MP4 EU MAP 2GB

Price: £55.55

4.3 SLIM GPS CAR NAVIGATION TOUCH SCREEN FM 2GB MAP 3D


4.3 SLIM GPS CAR NAVIGATION TOUCH SCREEN FM 2GB MAP 3D

Price: £55.55

NEW 4.3 GPS CAR NAVIGATION TOUCH SCREEN FM 2GB MAP 3D


NEW 4.3 GPS CAR NAVIGATION TOUCH SCREEN FM 2GB MAP 3D

Price: £55.55

NAVIONICS PLATINUM+ XL3 62P+ AUSTRALIA E & N MSD Chart Card


NAVIONICS PLATINUM+ XL3 62P+ AUSTRALIA E & N MSD Chart Card

Price: £325.00

HARD COVER PROTECTOR HOLDER CASE FOR GPS IN BLUE!


HARD COVER PROTECTOR HOLDER CASE FOR GPS IN BLUE!

Price: £3.99

TOM TOM ONE GB AND IRELAND N14644 CANADA 310


TOM TOM ONE GB AND IRELAND N14644 CANADA 310

Price: £35.00

GENUINE GARMIN ECOROUTE HD FOR NULINK 1695 2340 2390 2320


GENUINE GARMIN ECOROUTE HD FOR NULINK 1695 2340 2390 2320

Price: £73.97

4 PORT USB MULTI HUB EXPANSION- SLIM AND COMPACT


4 PORT USB MULTI HUB EXPANSION- SLIM AND COMPACT

Price: £2.99

TomTom GO 910 Automotive GPS Receiver faulty


TomTom GO 910 Automotive GPS Receiver faulty

Price: £42.00

TomTom GO 710 faulty not working


TomTom GO 710  faulty not working

Price: £25.00

GARMIN BlueChart g2 Vision on SD card (Small chart)


GARMIN BlueChart g2 Vision on SD card (Small chart)

Price: £159.00

7”Car GPS Navigation SAT NAV MP4 FM UK+EU MAP Bluetooth


7”Car GPS Navigation SAT NAV MP4 FM UK+EU MAP Bluetooth

Price: £72.99

Garmin eTrex Summit GPS Receiver


Garmin eTrex Summit GPS Receiver

Price: £45.00


GPS Sat Nav


The GPS normally consists of 24 satellites in 6 orbital planes. Each satellite circles the earth two times every day. The satellites hold atomic clocks and continuously transmit the exact time, along with several other administrative information. The receiver does not necessarily need a precise clock, but it needs to have contact to four satellites in order to unambiguously compute its individual latitude, longitude, elevation and the explicit time. By comparing the signals from 2 satellites, the receiver can compute the diversity between the distances to the 2 satellites. Because the receiver also understands the exact locations of the four satellites, 3 such differences allow a system of 3 (nonlinear) equations for the 3 unknown latitude, longitude and the elevation. As soon as the receivers location and therefore distance to the satellites are known, the time signal sent out by 1 of the satellites allows to compute the exact time at the receiver's location. If elevation information is not essential, only 3 satellites need to be contacted.