Using The 200Dx - Humminbird 200DX Dual Beam Operation Manual

USING THE 200DX

MENU FUNCTIONS
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: 7 ½' (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 ½' (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 a 600' (185m) range is in
use, the Zoom range is 60' (20m).