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.
Tom Tom XL IQ Routes Edition UK and Republic of Ireland
Price: £99.00
Navman S100 S150 S200 Europe S300 S300t In Car Charger
Price: £2.49
GARMIN NUVI 550 765 765T 775 775T T MAINS CHARGER
Price: £3.99
NEW GPS antenna for Pioneer AVIC X1R X2 810HVT 800 DVD
Price: £19.99
GPS ANTENNA for SAT NAV BECKER JVC SONY APS30 wiclic
Price: £15.99
SAT NAV GPS ANTENNA FAKRA MFD2 RNS2 RNS-E MFD 2 VW 0295
Price: £11.99
Genuine TomTom 550 750 950 Live USB Mains Fast Charger
Price: £8.49
New Genuine TomTom One XL V2 V3 V4 Live IQ Routes Case
Price: £12.49
New 100% Genuine Original TomTom One XL V1 Classic Case
Price: £12.49
New Genuine TomTom 520 720 920 Original USB Car Charger
Price: £9.79
New Genuine TomTom 510 710 910 Soft Carry Case Pouch
Price: £4.89
New TomTom Go 510 710 910 300 500 700 Mains Charger
Price: £7.89
New TomTom Rider Rider 2nd Edition Mains Travel Charger
Price: £7.90
New Genuine TomTom Go 550 750 950 Live Original Case
Price: £13.99
NAVMAN SPIRIT 500 TRAFFIC
Price: £51.00
faulty tom tom go 520 only works when on charge
Price: £55.40
Advanced GPS GSM GPRS Tracking System Tracker sat-nav
Price: £36.00
4GB Micro SD HC Memory Card Garmin zumo 220 400 500
Price: £8.95
Tomtom Go 530 Sat Nav
Price: £105.00Price: £125.00
MERCEDES BECKER COMAND REPAIR SERVICE
Price: £95.00
4GB CLASS 6 TRANSCEND SD HC MEMORY CARD SDHC 4 GB UK 4G
Price: £10.95
Binatone A350 Satellite Navigation
Price: £40.00
TOMTOM ONE WITH TOUCH SCREEN DISPLAY
Price: £51.00
USB Car Charger for TomTom GO 930 GO930 SatNav GPS
Price: £4.99Price: £6.99
Garmin Nuvi 200 GPS SatNav With Carry Case
Price: £17.02
Becker BE7914 Europe Sat Nav
Price: £33.00
Garmin Forerunner 205 GPS
Price: £70.00
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.