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Q. How accurate is a GARMIN GPS?

A. With the end of Selective Availability, you can expect horizontal accuracy of 20m to 35m (60' to 105') for older 8 channel units and 7m to 15m (21' to 45') for newer 12 parallel channel units in good reception conditions. For altitude you can expect accuracy to range from +/- 75m (225') for an 8 channel unit and +/- 35m (105') for 12 parallel channel units in good reception conditions. There are a number of environmental conditions that can effect GPS accuracy due to varying satellite signal reception conditions and can therefore lead to better or worse accuracy's than listed above. The satellite status page on most GARMIN GPS units will provide a real-time estimate of the relative accuracy of the position reported by the GPS receiver.

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