Quick Answer
The most common mistakes when using GPS include relying too heavily on the device, failing to set proper coordinates, and not accounting for magnetic variation, which can lead to inaccurate navigation.
Over-Reliance on GPS
Using GPS as a primary navigation tool can lead to over-reliance and a lack of basic navigation skills. In situations where the GPS device is damaged, lost, or unable to receive a signal, users may be left without a means of navigation. This is why it’s essential to learn basic navigation skills, such as reading a map and using a compass.
Incorrect Coordinate Entry
Failing to set the correct coordinates can lead to navigation errors. When entering coordinates, it’s essential to ensure that the correct datum is selected, as this can affect the accuracy of the location. For example, entering coordinates in the WGS 84 datum can result in a location being off by several miles if the actual location is in a different datum.
Magnetic Variation and Compass Use
Magnetic variation, also known as magnetic declination, can significantly affect the accuracy of a GPS device. Failing to account for magnetic variation can result in navigation errors of up to 20 degrees. To avoid this, it’s essential to use a compass to verify the direction of travel and to make adjustments for magnetic variation. This can be achieved by consulting a magnetic variation chart or using a GPS device with built-in magnetic variation correction.
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