Garmin zumo 220 Car GPS Receiver - Specs

GPS has a variety of applications on land, at sea and in the air. The most common airborne applications are for navigation by general aviation and commercial aircraft. At sea, GPS is also typically used for navigation by recreational boaters, commercial fishermen, and professional mariners. Land-based applications are more diverse. GPS is now commonplace in automobiles as well. Some basic systems are in place and provide emergency roadside assistance at the push of a button (by transmitting your current position to a dispatch center). More sophisticated systems that show your position on a street map are also available.
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A Desktop's form factor describes the physical size and shape of the system. In general, towers and larger form factors offer more space for add-ons and cost less than smaller counterparts.
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Most PDAs have touch screens that require a stylus to enter data. You can also find devices with a Jog Dial, that allows you to scroll through pages and make selection quickly. Still other PDAs have full keyboards.
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Most of the new sophisticated systems show your position on a map. The Basemap GPS unit will show interstates, highways, lakes, rivers, railroads, cities, airport location etc. The Mapping GPS units have the ability to download detailed maps from PC.
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A receiver is often described by its number of channels: this signifies how many satellites it can monitor simultaneously. The more the number of channels, the better the accuracy - but only to a point. The maximum amount of satellites a reciever can realistically track is around 20, which is good enough for most consumer gps use cases. Hence more than 20 channels are typically of no benefit.

More Information:
- Do Chipset Channels Matter
- Why buy a 12 Channel GPS Receiver?
- GPS Wikipedia
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Diagonal Screen Size is the size of your TV screen, measured diagonally in inches.
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Display size WxH
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Some camcorders include a small LCD screen that displays the image that is being recorded.
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The map reference that comes preinstalled on the device.
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Some GPS have extra features not normally associated with menus in tracking devices. These can indicate extra information such as weather or temperature readings, altitude or even icon options.
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Many GPS systems have preset trip calculations capable of showing your average speed, total distance traveled, time spent moving, time spent stopped, and other information such as;
Shortest Time (fastest time) allows you to calculate your route using shortest distance, considering speed limit factors
Shortest Distance / route determines your best route by shortest distance traveled
Least Use of Freeways calculates your route through city and side streets enabling you to stay off the highways when possible
Most Use of Freeways provides directions over freeways, highways and interstates.
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Waypoints are locations or landmarks worth recording and storing in your GPS. These are locations you may later want to return to. They may be checkpoints on a route or significant ground features. (E.g., camp, the truck, a fork in a trail, or a favorite fishing spot). Waypoints may be defined and stored in the unit manually, by taking coordinates for the waypoint from a map or other reference. This can be done before ever leaving home. Or more usually, waypoints may be entered directly by taking a reading with the unit at the location itself, giving it a name, and then saving the point. Waypoints may also be put into the unit by referencing another waypoint already stored, giving the reference waypoint, and entering the distance and compass bearing to the new waypoint.
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This indicates how long the batteries will last, in hours.
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We show Flat Panel TV height without stand
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Depending on the type of use and portability needed, weight is an important consideration when selecting a product.
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