To disable Zoom, press the Menu button until

USING THE 250DX

MENU FUNCTIONS

Automatic Zoom is especially helpful when looking for structure or bottom detail. The Automatic Zoom keeps the bottom in view even in quickly changing terrain, but is most useful in flatter areas without considerable depth variation. Manual Zoom provides detailed information of any area from the surface to the bottom. In manual Zoom, the Zoom range does not move as the terrain changes.

When the range is shown in the menu, the upper number represents the top of the current Zoom

range. The lower number represents the bottom of the Zoom range. Use the UP and DOWN ARROW

buttons to move this range. The upper number can never be less than 0 (the surface of the water), and

the lower number can never be greater than the

active depth range. The difference between the two numbers (the Zoom range) is preset and determined by the active depth range.

Once manual Zoom is selected, the display appears the same as in Auto Zoom, but the zoom range does not change automatically.

To disable Zoom, press the MENU button until the

Zoom menu is on-screen. Use the UP ARROW to highlight Off, and let the menu time out.

When the unit is powered off, the Zoom menu returns to Zoom Off.

Depth Alarm. The 250DX contains an audible alarm to warn you of shallow water depths. The alarm is adjustable to depths of 1m (3') to 30m (99'). When the alarm is enabled, an audible alarm sounds if the water beneath the boat is