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Track: A Track is a series of saved points that define the past path of the boat. These Track
Points are saved at regular time intervals. Tracks are a useful and quick method to see
where you’ve been, and an easy guide to follow to get you back to the starting point.
Generally, all GPS units have a limited number of Track Points that can be saved before
the unit runs out of memory and begins erasing the first track points saved. Because of
this, the user can adjust the Track Point Interval menu to increase the amount of time
between when points are saved, and thus extend the distance covered by a track. Tracks
can also be permanently saved to memory, and re-displayed at the user’s option.
Track Line (TRK): The Track Line is the desired line of travel between two waypoints, and
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, Course Over Ground.
Trackplotter: Trackplotter describes a navigation device that shows Present Position,
along with Track, Waypoint, and Routes, but NO MAP in the background. See
Chartplotter.
Trolling Grid: Trolling Grid is a Humminbird® feature that displays a precise reference
grid around a waypoint. This grid is used as a guide pattern for trolling around a specific
area to assure a more efficient and complete coverage of that area. Trolling Grid
resolution be changed by zooming in or out on the chart. The Trolling Grid can also be
rotated on the display to orient it for optimal boat course for wave and wind conditions.
UTC: UTC is an acronym for 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)). To display the correct Local Time in a Humminbird® GPS unit, the
user must use the Local Time Zone menu and select the time zone (i.e. EST, CST).
WAAS: WAAS is an acronym for 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 received by the standard
Humminbird® GPS Receiver. With WAAS signal, GPS accuracy is improved to within 3
meters 95% of the time. Outside the United States, regional governmental coalitions
have created similar systems such as EGNOS (Europe) and MSAS (Japan).
Waypoint: A Waypoint is 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