USING THE 250DX
MENU FUNCTIONS
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 (7¹⁄₂'), 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 (7¹⁄₂'). If the 20m (60') or 40m (120' ) range is in use, the Zoom range is 5m (15'), if a 60- 150m
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 which the Zoom range is constantly adjusted to show the bottom, or manually, in which the user controls the location of the Zoom range.
Depth Range
Upper Zoom Limit
16 | Lower Zoom Limit |