Humminbird Ultima Operation Manual page 17

4. Enabling Fish Alarm;
Factory setting: OFF
The Fish Alarm alerts you with a chirping sound
whenever the Ultima detects fish (or another object not
attached to the bottom). To activate it, select FISH
ALARM and press the ON-OFF button. A fish symbol
reminds you that the alarm is on.
5. Using Zoom;
Factory setting; OFF
Zoom provides an up-close view. To activate it, select Zoom
and press ON-OFF. The Zoom view initially begins at the
surface; pressing the UP or DOWN arrow adjusts Zoom
depth. The range of the display is shown when Zoom is on
and a "ZM" appears by the bottom range number.
The Zoom range depends on the current depth range: 3
meters in the 5 and 9 and 19 meter depth ranges, 5 meters
in the 37, 55 and 74 meter depth ranges, and 10 meters in
the 11 I to 185 meter depth ranges.
Remember: If Zoom is the last function selected, you can
use the arrow button to adjust the Zoom depth or ON-OFF
to switch Zoom on and off without having to press SELECT
first.