Humminbird Wide Vision - Manual (Page 25)

The digital depth readout will continue to track the bottom even when Zoom is enabled.
Bottom Lock is a function of zoom, except the depth adjustment is controlled automatically to view the
area immediately above the bottom. This is especially useful if you are looking for structure or minor
variations in terrain in areas of relatively flat bottom terrain. To enable Bottom Lock, press ENTER until
the "BL" is highlighted. The zoom range will be controlled by the current depth range, as in Zoom, and will
be indicated on the Zoom menu.
Bottom Alarm
The Wide Vision contains an audible alarm to warn you of shallow water depths. This alarm is adjustable
from 2' to 99' of depth. To enable the alarm, simply adjust the alarm depth using the UP and DOWN arrow
buttons, and press ENTER. Whenever the depth of the water beneath your boat is equal to or less than
the selected alarm depth, a continuous alarm will sound.
To disable the alarm, either move to deeper water, or select the Bottom Alarm menu, and press ENTER
to turn the alarm off.
Fish Alarm
The Fish Alarm alerts you to the presence of fish, or other targets not attached to the bottom, in the water
beneath your boat. The Fish Alarm has 3 different settings which correspond to the 3 different size fish
targets shown on-screen.