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Track Line (TRK) The planned line of travel between two waypoints, and it represents
the most efficient path between the two points because it is a straight line. The TRK is
measured in degrees (i.e. 321°, where 000° is North, 090° East, 180° is South, 270° is
West). See
Cross Track Error and Course Over Ground.
Trackplotter AnavigationdevicethatshowsPresentPosition,alongwithTrack,Waypoint,
and Routes, but NO MAP in the background. See
Chartplotter.
Trolling Grid A Humminbird® feature that displays a precise reference grid around a
waypoint. This grid is used as aguide pattern fortrolling around aspecific areato assure a
more efficient and complete coverage of that area.
UTC (Universal Time Constant) UTC is the “standard time” used in navigation and is
the local time in Greenwich England. (UTC is equivalent to Greenwich Mean Time (GMT)).
WAAS (Wide Area Augmentation System) WAAS is complementary technology to
GPS that provides enhanced accuracy through correction signals broadcast from Federal
Aviation Administration WAAS satellites stationed over the USA. These secondary signals
are automatically receivedby thestandard Humminbird®GPSReceiver.With WAAS signal,
GPS accuracy is improved to within 3 meters 95% of the time. Outside the United States,
regionalgovernmental coalitionshavecreatedsimilarsystemssuchasEGNOS(Europe)and
MSAS (Japan).
Waypoint The saved location (latitude, longitude) of a point of interest that is stored in a
GPS receiver’s memory. This can include a marker buoy, dock, fishing hole, or anywhere
else the user may want to return to. Humminbird® products offer the ability to name and
assign a symbol to the saved location. Depth, Date, and Time of Day when the waypoint
was created is also saved.
Waypoint Target A Humminbird® feature that displays a precise “bull’s eye” around a
selected waypoint. This bull’s eye is used to easily monitor boat position relative to a
waypoint, and is useful for fishing over submerged structure. With Waypoint Targets, a
quick look at the screen lets you know how far off the waypoint the boat has drifted.
Glossary -GPS & Navigation Terms