Imagine yourself in the middle of a camping date, and wanting to go off of the trail to look for food or fuel. If you're taking your cue from a map generated online, then you may have to meticulously need those specific directions at all times. Good old maps may not be any better, as they contain tips about the restaurants, hotels or gas stations in the area. But the case is way different with regards to GPS systems. Imagine having a portable tour guide in your car! If you want to get to that nearby restaurant or hotel as soon as possible, just pick the category you want from your GPS screen, and out pops a bunch of restaurants or hotels that can have you on a good run all over town. Upon finishing your choice, the GPS system will make the needed adjustments in your directions.

A diverse range of companies are considered as authorities when it comes to making GPS systems that can work at anytime of the day, under rain or shine. The moment you lay your hands on your GPS device, you only to have an outdoor view of the sky directly above you to use it. What's more, there really is no need to sign up for any service. Now let's try to understand the technical side of this gadget. A GPS device gets its data from a connected chain of satellites orbiting crisscrossing the planet above and uses the information to compute your exact location. A GPS is able to give your latitude and longitude on request by consulting three satellites. On top of that, a fourth satellite will be able to compute your altitude. With all this powerful data, it is no wonder that GPS technology is able to lend a hand in practically all occupations, hobbies and interests. It is used at work by almost everybody from rescue crews to tour guides, at play by bikers and by hikers, and on the road and on the go by anybody on the freeway.

Looking for your next car GPS? Don't know what to expect? Here are some of the main features and functions available on portable vehicle GPS navigators. Compared to the more high-end and high-priced versions already installed in some vehicles, a portable GPS device can be used in multiple vehicles. The power issue is really no issue; it can be supplied either by an internal battery or the 12 volt outlet in a vehicle's interior. How about the address book? These, and the names of locations are entered on a touch screen which shows 3D maps that get refreshed in real-time as the vehicle progresses towards the designated target address. It's all up to the brand or model, but maps for the United States, Canada and Europe can be acquired. Satellites keep track of where the vehicle is at all times. And have you heard about the spoken turn by turn directions-aid in navigation? Not a few GPS systems carry this function. Settings can be modified in such a way that the spoken directions can be set in such a way to include street or road names. Aside from being able to choose between a male or female voice, some brands even go as far as include the perk of what celebrity the GPS' voice sounds like! A few brands or models are also capable of translation into different languages. Imagine the GPS selecting a route, and then the driver messes things up by missing the turn. Not to worry; the GPS will actually return directions to get the car-GPS user back on track. In urban areas, some GPS receivers will even give alternative routes in the event there is traffic build-up ahead. Other GPS systems display the best routes that steer clear of toll booths. Some mobile GPS devices that are Bluetooth compatible permit hands-free functioning, but only if the driver uses a Bluetooth enabled cell phone. Drivers can then simply 'talk' out loud to the GPS in order for it to spot a point of interest such as a convenience store, and call to reserve a spot. In the end, nothing can replace a driver's experience or common sense, and not even a portable GPS receiver which is an excellent replacement to the paper map. For example, nobody blinks at a -GPS' accuracy, but you are in for a rare surprise when you use GPS on hilly terrain, when turn directions may become buggy. Now, if the case is that you are not the type who drives frequently to new destinations, then skip getting yourself a portable GPS. But if you like the security and convenience of getting to where you want to go, but without the unpleasant wasted time, then you can count on a portable car GPS device to be the automotive accessory you can't leave home without.

Okay, so you got your GPS system already. But you want to check what accessories can go with your newest purchase. Take a look at the list of add-ons below. GPS software: With these, you acquire detailed maps and points of interest for your GPS device. GPS holders: Your GPS device, be it a mobile unit or a car GPS, is most secure when you stabilize it on your dashboard or laptop with GPS holders. GPS antennas: Believe it or not, GPS antennas really help. These lend strength to your GPS signal and make it more efficient. GPS chargers & cables Bluetooth: The technology, available through short-range wireless, keeps your Bluetooth GPS device in touch with your Bluetooth-enabled computer, PDA, or cell phone from up to 30 feet away. Memory cards. Adapters: A cigarette lighter adapter provides a convenient source of power on the road.