Insignia 350TX - Manual (Page 18)

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
display resolution is increased, and the
unit’s ability to separate close targets is
enhanced.
There are four Zoom ranges available:
2m (7
¹⁄₂'), 5m (15'), 10m (30'), and 20m
(60'). These ranges are not directly user
controlled but are instead dependent on
the current depth range. In shallow
water, when the 5m (15') or 10m (30')
range is in use, the Zoom range is
2m (7
¹⁄₂'). If the 20m (60') or 40m (120')
range is in use, the Zoom range is
5m (15'), if a 60-150m (180'-480')
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).
The Zoom range is shown on the left side
of the screen and full range information is
shown on the right side of the display.
Zoom can either operate automatically, in
16
USING THE 350TX
MENU FUNCTIONS
Depth Range
Lower Zoom Limit
Upper Zoom Limit