21
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
sonar off, the depth alarms will be inoperative. These alarms can be used
at the same time or individually.
To adjust the shallow alarm, high-
light the “Depth” label in the Shal-
low Alarm box. To adjust the deep
alarm, highlight the “Depth” label
in the Deep Alarm box. Both
alarms adjust identically. We’ll use
the shallow alarm as an example.
Highlight the “Depth” label, then
press the ENT` 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 until the next to
last number is highlighted, 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 down arrow key once. This changes the “1” at the end of the number to
a “0”. The depth now shows 10 feet.
Press the ENT key to accept this setting. The unit returns to the alarms
menu, showing a shallow depth of 10 feet. Now you can activate the alarm
by highlighting the “Enabled” label and pressing the ENT key.
With the shallow alarm set at ten feet, anytime the digital depth display
goes below ten feet, the shallow alarm sounds.
Set the deep alarm in the same manner. If the digital depth reading goes
below the deep alarm setting, the deep alarm will sound.
ZONE ALARM
The zone alarm is triggered when any echo passes inside the zone alarm
bar, shown on the right side of the screen. To turn the zone alarm on,
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