Humminbird Platinum ID 120 Operation Manual page 26

5. Enabling Fish Alarm
Factory Setting: OFF
The Fish Alarm alerts you with a chirping
sound whenever the Platinum ID detects fish
(or another object not attached to the bottom).
To activate it, select FISH ALARM and press
the ON-OFF button.
Initially, the fish alarm will sound when any
target not attached to the bottom is detected.
The word "ALL" is displayed on the menu and
two fish are shown at the lower part of the
display. By pressing either arrow button, the
word "LARGE" appears and the alarm will
sound only when a large target is detected. A
single fish symbol is shown on the bottom of
the display to represent that large fish only is
selected. While there is some variation in
sonar characteristics of different species,
typically, the strength of the return is relative
to the size of the fish.
6. Using Zoom Range
Factory Setting: OFF
Zoom Range provides an up-close view. To
activate it, select ZOOM RANGE and press
ON-OFF. The Zoom view begins initially at the
surface; press the Up or Down arrow to adjust
Zoom depth. The range of the display is shown
when Zoom is on.
The Zoom range depends on the current Depth
Range: 7 ½' in the 15' and 30' Depth Ranges;
15' in the 60' and 120' Depth Ranges.
You can adjust zoom depth before activating
zoom, in which case the zoom range will be
shown with horizontal dotted lines.
USING THE PLATINUM ID 120
OPERATING INSTRUCTIONS