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H
GPS W
OW
GPS was originally intended for military use; however, civilians may
also take advantage of its highly accurate position capabilities,
typically within +/– 2.5 to 10 meters, depending on your conditions
and your Humminbird model. This means that 95% of the time, the
GPS receiver will read a location within +/– 2.5 to 10 meters of your
actual position.
Your GPS receiver also uses information from WAAS (the Wide Area
Augmentation System), EGNOS (the European Geostationary
Navigation Overlay Service), and MSAS (the MTSAT Satellite
Augmentation System) satellites if they are available in your area.
ORKS
Your Humminbird uses GPS to determine
your position and display it on a grid.
GPS uses a constellation of satellites that
continually send radio signals to the earth.
The GPS receiver on your boat receives
signals from satellites that are visible to it.
Based on time differences between each
received
determines its distance to each satellite.
With distances known, the GPS receiver
mathematically
position. With 5 updates per second, the
GPS receiver then calculates its velocity and
bearing.
signal,
the
triangulates
2
GPS
receiver
its
own
Overview
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