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Glossary GPS & Navigation Terms
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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 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: Waypoint Target is 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
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