NorthStar 961 Reference Manual page 48

Chapter 2 - Introducing the 961/962
Echo sounder
Chart-screen
features
Page 2-4
If enabled, the ECHO SOUNDER screen indicates the depth of
the water under the vessel, the position and depth of fish, and
the contours of the seabed. This information comes from
Northstar 490 Echo Sounder, which is connected to the 961/
962 and a Northstar-recommended transducer. For details
about using the echo sounder, see the Northstar 490 Echo
Sounder Operations Manual (part number GM490).
The CHART screens maximize usability by including such
features as fast chart redraw, an LCD screen with easy-to-read
numbers, and a plotter function for up-close navigation.
Chart redraw
Normally, as you navigate, your vessel remains centered on
the CHART screen, and the chart moves underneath it. The
high-speed screen redraw feature automatically keeps the
chart visible—even as you move from one chart to the next.
Lighting
The liquid crystal display (LCD) screen is easy to see in all
kinds of light—from full, direct sunlight to total darkness.
Anti-reflection treatment of the screen removes over 90
percent of the reflection and glare usually found in bright
sunlight. Moreover, the screen is fully lit for nighttime use.
To adjust the screen's brightness, press the BRIGHTNESS key
(this key isn't labelled) to the left of the display screen. For
details, see "Brightness key" starting on page 3-27.
Plotter function
The plotter function helps you navigate if you're ever in areas
that aren't represented on your installed navigational charts.
The plotter function is particularly useful when you're fishing
out in the open ocean and using stored tracks and waypoints
as reference points. The your boat symbol is automatically
displayed on a north-up grid of lat/lon lines while the system
plots your position and waypoints. When you're using the
plotter function, the menu keys to the right of the chart views
961/962 Operations and Reference Manual, Rev. A