Zoom Screen - NorthStar EXPLORER 443S Installation And Operation Manual

Stationary boat
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When a boat is stationary, all bottom echoes will come from the same small
area of bottom. This will produce a flat bottom trace on the screen.

3-4 ZOOM screen

Select MAIN MENU - ZOOM to display the ZOOM
screen.
The ZOOM screen is split into two parts. On
the right is the full range section (just like the
HISTORY screen) and on the left is the zoom
section.
The full range section illustrated is 150 feet and
the zoom bar, located on the right edge of the
screen, shows the area that is enlarged in the
zoom section, in this case the section between
50 ft and 100 ft.
The appearance of the HISTORY and ZOOM screens can be
changed to suit individual preferences.
Full range section
Zoom section
Zoom bar
Northstar Explorer 443s/443sp Installation and Operation Manual
Now
Note: Times indicated are for illustration only.
The zoom section shows the area of interest
(such as fish or features close to the bottom) in
greater detail than the HISTORY screen.
Bottom Lock
The zoom bar is normally locked to the bottom
(Bottom Lock) so that the bottom is always
displayed in the zoom section, regardless of
changes in depth.
To turn Bottom Lock off, press
zoom bar to the desired position with
To turn Bottom Lock on, move the zoom bar
down until it touches the bottom and the
message "BOTTOM LOCK ON" briefly appears.
If Bottom Lock is off and the bottom rises to meet
the zoom bar, the zoom bar will temporarily track
the bottom. This condition will cease when the
depth exceeds the original depth of the zoom
bar.
Changing the Zoom
To increase magnification (make the zoom bar
smaller), press . To decrease magnification
(make the zoom bar bigger), press .
Alternatively, the zoom bar can be adjusted in the
HISTORY screen before switching to ZOOM.
Time
then move the
or .
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