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always determines the depth of the
bottom, even if it is not visible
on-screen.
Using manual Depth Range control,
you can view sonar information from
the area near the surface in great
detail.
To return to automatic Depth Range
control, press the MENU button until
the Depth Range menu appears on-
screen and use the UP ARROW to
select AUTO.
Zoom.
Zoom is similar to Depth Range
because it controls the range of information
displayed on screen. Zoom, however,
allows selection of ranges beneath the surface
so any area of water between the surface and
the bottom can be enlarged to provide more
detailed information. By using the full display to
show a small area of coverage, the effective dis-
play resolution is increased, and the unit’s ability
to separate close targets is enhanced.
There are four Zoom ranges available: 7
¹⁄₂
'
(2m), 15' (5m), 30' (10m), and 60' (20m).
These ranges are not directly user controlled
but are instead dependent on the current
depth range. In shallow water, when the
15' (5m) or 30' (10m) range is in use, the
Zoom range is 7
¹⁄₂
' (2m). If the 60' (20m) or
120' (40m) range is in use, the Zoom range
is 15' (5m), if a 180'-480' (60-150m) depth
range is in use, the Zoom range is 30'
(10m), and if the 600' (185m) range is in
use, the Zoom range is 60' (20m).
USING THE TRACKER UNIT
MENU FUNCTIONS
Depth Range
Lower Zoom Limit
Upper Zoom Limit
