Eagle Optima, Руководство пользователя

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18
ALARMS
The Optima has three different types of sonar alarms. The first is the Fish
Alarm. It sounds when the Fish I.D. feature determines an echo or group
of echoes is a fish. Another alarm is the Zone Alarm which consists of a bar.
Any echo that appears inside this bar triggers this alarm. The last alarm is
called the Depth Alarm. Only the bottom signal will trigger this alarm. This
is useful as an anchor watch, a shallow water alert, or for navigation.
To adjust an alarm, first press the
ALARM key. The screen shown at
right appears. Follow the instructions
below for setting each alarm.
DEPTH ALARMS
The depth alarms sound a tone when
the bottom signal goes shallower than
the shallow alarm’s setting or deeper
than the deep alarm’s setting. For
example, if you set the shallow alarm
to ten feet, the alarm will sound a tone
if the bottom signal is less than ten
feet. It will continue to sound until the bottom goes deeper than 10 feet. The
deep alarm works just the opposite. It sounds a warning tone if the bottom
depth goes deeper than the alarm's setting. Both depth alarms work only
off the digital bottom depth signals. No other targets will trip these alarms.
If you turn the digital off, the depth alarms will be inoperative. These alarms
can be used at the same time or individually.
To adjust the shallow alarm, highlight
the "Shallow Depth" label. To adjust
the deep alarm, highlight the "Deep
Depth" label. Both alarms adjust iden-
tically. We'll use the shallow alarm as
an example. Highlight the "Shallow
Depth" label, then press the right ar-
row key. The screen shown at right
appears.
Use the up or down arrow keys to
select the number, the right and left
keys to move from number to number
in the depth. For example, to set the shallow alarm depth to 10 feet, press
the right arrow key once, then press the up arrow key once. The changes
the second "0" to a "1". Next, press the right arrow key again and press the