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.

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection

Tags notebooksbuying guideGPSsat navmobiles phonessmartphones

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

GoodGearGuide Staff

Good Gear Guide
Show Comments

Most Popular Reviews

Latest Articles


PCW Evaluation Team

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

George Khoury

Sharp PN-40TC1 Huddle Board

The biggest perks for me would be that it comes with easy to use and comprehensive programs that make the collaboration process a whole lot more intuitive and organic

David Coyle

Brother PocketJet PJ-773 A4 Portable Thermal Printer

I rate the printer as a 5 out of 5 stars as it has been able to fit seamlessly into my busy and mobile lifestyle.

Kurt Hegetschweiler

Brother PocketJet PJ-773 A4 Portable Thermal Printer

It’s perfect for mobile workers. Just take it out — it’s small enough to sit anywhere — turn it on, load a sheet of paper, and start printing.

Featured Content

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?