GPS navigation device

Ranked #102 on the list Best Measuring Instrument of All Time

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About GPS navigation device

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A GPS navigation device is any device that receives Global Positioning System (GPS) signals for the purpose of determining the device's current location on Earth. GPS devices provide latitude and longitude information, and some may also calculate altitude, although this is not considered sufficiently accurate or continuously available enough (due to the possibility of signal blockage and other factors) to rely on exclusively to pilot aircraft. GPS devices are used in military, aviation, marine and consumer product applications. GPS devices may also have additional capabilities such as: In other words, all GPS devices can answer the question "Where am I?", and may also be able to answer: Consumer GPS navigation devices include: Dedicated devices have various degrees of mobility. Hand-held, outdoor, or sport receivers have replaceable batteries that can run them for several hours, making them suitable for hiking, bicycle touring and other activities far from an electric power source. Their screens are small, and some do not show color, in part to save power. Cases are rugged and some are water resistant. Other receivers, often called mobile are intended primarily for use in a car,

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