Buying guide: GPS units and sat navs

Need help shopping for a GPS unit? Deciding between sat navs from Garmin, TomTom and Navman? Read our handy buying guide

Jargon Busters: GPS units

Atomic clock: Atomic clocks are the basis of a GPS navigation system. The GPS master clocks are atomic clocks at the ground stations, and each of the GPS satellites has an on-board atomic clock.

Geographic location: A geographic coordinate system enables every location on the Earth to be specified by the three coordinates of a spherical coordinate system that is aligned with the spin axis of the Earth.

GPS: GPS stands for Global Positioning System. More than 24 GPS satellites orbit the Earth, transmitting signals that allow GPS receivers to determine the receiver's location, speed and direction.

Latitude: Latitude gives the location of a place on Earth north or south of the equator. Latitude is an angular measurement in degrees, ranging from 0° at the Equator (low latitude) to 90° at the poles (high latitude).

Longitude: Longitude describes the location of a place on Earth east or west of a north-south line called the Prime Meridian. Longitude is given as an angular measurement ranging from 0° at the Prime Meridian to +180° eastward and -180° westward.

MicroSD card: A miniature version of an SD card, most commonly used in mobile phones, smartphones and some portable GPS units.

POI: POI Stands for Point of Interest. A POI is a specific point location that someone may find useful or interesting. The term is widely used in GPS navigation software.

Satellite: A satellite is any object that orbits another object. Satellites can be manmade (such as those used for GPS) or may be naturally occurring.

SD card: SD stands for Secure Digital. An SD card is a flash memory card format developed by Matsushita, SanDisk and Toshiba for use in portable devices. An SD card can be used in a number of digital cameras and GPS units.

SUNA Traffic Channel: The SUNA Traffic Channel broadcasts live traffic information directly to a compatible GPS navigation system. This enables users to be redirected around accidents or traffic build-up.

Touch screen: A touch screen is a display that has the ability to both display and receive information. This allows display to be used as an input device, eliminating the need for physical buttons.

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8 Comments

Anonymous

1

GPS maps for Navman iCN320

Hi,
Need some assistance with map finding for my 2nd hand Navman iCN320. It appears it is an older GPS and I'm not sure what or where I need to be looking to purchase maps for it. I would also like to know what type of maps it would require or what other applications are compatible with it. A comparison site would be good, both listing prices and applications. Please advise.
929tracy.

929tracy

2

GPS maps and or applications

Hi,
I require some assistance with a 2nd hand Navman iCN320 I have purchased. It does not come with maps and I would like some guidance as to what and where to look in order to purchase one. I would like to know what system or applications I need to look for and would ideally like a comparison site for applications, compatibility and pricing if possible. Look forward to a reply.
929tracy.

Brian Garvin

3

When I was in the military we used GPS systems. Now they are everywhere including vehicles. I'm sure eventually they'll have the technology to plant them in people so they can be located if they are ever lost. That would end up solving a lot of crimes.

Brian Garvin
http://www.totalhealthathome.com

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5

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Jan

7

Which GPS? None of the above!
Navig8r (hard to find) does so much: The major benefits . . .swap out the 4Gb database SDHD card, and watch a movie on one of your other cards to wind down in yr motel, listen to MP3 when you're out of range, verbal directions in an Aussie accent (yah, I can understand it), database maintained in Newcastle, and there are free on-line updates 3-4 times a year, speed/school warnings separate & also updated, big screen for a small screen price.
Only drawback so far: no speed restriction warnings up bush - too many councils not willing to keep others in the loop.

Recommended. About to buy another.

West Marine Coupons

8

Thanks for sharing such a good opinion, piece of writing is good, thats why i have
read it completely

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