Personal GPS Units

Whether traveling on business or vacation, it is important to be safe. Whenever information about current location and destination are needed, it is important they are readily available. The ability to know, with confidence, that this data is provided accurately, reliably, and in an easy to read manner is empowering to every kind of person in countless daily situations.

But how is it possible to have this kind of access to information? Enter the GPS system and the portable units that utilize it. While some units are readily portable, some are designed primarily to remain stationary. While the most widely known units are of the hand-held variety, there are also variations specially adapted for use in ocean navigation or aviation.

With the recent rapid advancements in technology, protection and confidence never before achieved is now available. There is no need to wait for a couple of decades.

A GPS unit is supported by a system of satellite that provide comprehensive information about navigation and time. It is for this reason they are widely used in terrestrial and marine navigation.

The standard GPS unit provides four styles in choosing a route. The first one is the shortest time to destination. Using this method, the GPS unit's advanced algorithms calculate a route given current location and destination. Based on that information, it selects the shortest route given distance and speed limit factors.

The second method available is shortest distance. This provides the route that is, as the name implies, the shortest distance between current location and destination.

Third, there is the method that makes the least use of highways or freeways. The GPS unit determines a route utilizing city streets and side streets. This method prevents the use of highways when desired such as during times when bad highway traffic is anticipated.

The final method used by GPS units makes the most use of freeways. This method endeavors to provide directions over highways, interstates and freeways as much as possible, and for long journeys will give similar if not identical routes to the shortest time calculation.

The average GPS unit also provides three styles of guidance screen. The map view is a display screen that is designed to appear bright, with high resolution to make text and icons easy to read. There may be as many as nine color combinations to choose from. The user can also zoom the map in or out for detailed viewing.

True view is another common GPS unit screen display style. It shows the road layout in a detailed view. This makes it ideal for use as a guide for turns and street navigation.

The third type of display is called the maneuver list screen. This screen displays details about where to expect turns while driving, in the familiar format of written directions.

Before purchasing a GPS unit, it is important to ensure that it has a bare minimum of features. For example, features like abundant waypoint storage, long battery life, a wrist strap, magnetic compass, and altimeter are a must.

There are many other features available in GPS units that take steps to ensure proper guidance for the user. One of the more important and useful of these is spelling and grammar auto correction. Another handy GPS unit feature is route exclusion, allowing the user to avoid a certain route by telling the unit to ignore it when making calculations. The majority of GPS units also incorporate the ability to immediately plot an alternate route for whatever reason, and can aid in quickly locating a specific place or locality.

Many people imagine that GPS units are difficult to learn to operate. However, most GPS units are carefully designed to be surprisingly user-friendly. Simply turn them on and they're ready to go.