The Basics of GPS: Function, Types, and Recommendation

Know the basics of GPS. Learn its function and types and know which unit to buy that will satisfy your navigation needs best.

Are you bad at directions? Do you constantly get lost when traveling to other places? Then, GPS is the solution to your geographical problems!

The GPS or Global Positioning System is an electronic navigation device that makes use of a network of satellites found on the Earth’s orbit to locate specific positions and placements. Originally created for military applications, the GPS was first used by the U.S. Department of Defense. It is during the 1980’s when the US government allowed its public use.

Because it takes advantage of the satellite systems above the Earth, GPS units can be used anywhere in the world for 24 hours a day. It works in any weather condition and does not require any set-up fee or subscription charge. GPS units come in a wide variety of specifications and are manufactured by several companies. They are available in consumer electronics shop such as the Apple store and the likes.

How does a GPS work?

GPS units work by receiving information from GPS satellites that circle the earth in specific frequency. These satellites transmit information to the earth through the GPS unit or receiver, using triangulation to calculate and identify the exact location of the user. GPS receivers also compute and compare the time when the signals were transmitted and received, and such time difference also helps in locating the user’s exact position. GPS units feature a screen that serves as an electronic map where the user’s location is to be shown.

Major types of GPS

Below are the major types of GPS receivers:

1. Portable GPS. This type of GPS units is portable enough to be carried along while traveling by foot or car. However, it is not small enough to be kept inside the pocket. It typically measures 4 inches wide and weighs about 10 ounces.

2. Pocket GPS. This type of GPS unit is designed to fit inside the pocket of pants or shirt. It weight about 5 ounces, with a screen that measures 3.5 inches. It typically costs more than the portable units because of its small, slim, and lightweight feature.

3. In-Dash GPS. This type of GPS unit is built into the automobile’s dash board. It is not meant to be carried along, thus adding security to the unit and avoiding loss. More and more automobile companies offer built-in GPS units on the cars and vehicles they are selling.

4. Fitness and Cycling GPS. This type of GPS unit is especially created for people who walk, jog, run, or ride the bicycle. It is designed to fit snuggly on the wrist, just like a wrist watch. Aside from the navigation feature of the device, it can also track the athlete’s pace, distance, speed, and even calories burned.

5. Motorcycle GPS. This type of GPS unit is almost the same as that of used in cars, but is designed to fit on motorcycle consoles, waterproof, and vibration resistant. Most units come with Bluetooth hands-free technology feature.

6. Marine GPS. This type of GPS unit is specifically designed for marine use and comes with plotting functionality. It is equipped with special marine database and navigational aids such as sound signals, buoys, and day beacons among others.

Buying guide for GPS

Before buying your GPS unit from an electronic shop or the Apple store, make sure you know which type best suits you and your needs. While the typical price of GPS units ranges from $100 to as much as $800 depending on the built-in features, there are other units that come with a good deal, like a few bucks off $100. Though other advanced features are tempting and useful, what’s important are the basic functionalities and the ease of usability of the unit.

So before you get one yourself, make sure you have reviewed the different models and brands available and identified which unit will be of best help to you and your navigation needs.