Humminbird 1155C - Manual (Page 128)

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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.