Pressing the
keys adjacent
to
this label moves
the
top
of the
zone alarm bar
up or down.
To turn
the Zone Alarm off, return to the Zone Alarm menu, then press
the
key adjacent to the "OFF" label.
NOTE: The Zone Alarm will not
operate
and is not available when the
Z-9500 is in the Full Screen Bottom Track mode,
but it can be used in
the Split Screen mode. To use the Zone Alarm in the Split Screen
Bottom
Track mode,
first enable the Split Screen Bottom
Track, then
turn the zone alarm on.
Bottom Alarm
The Bottom Alarm works off the bottom signal only. No other echo
will
trigger
this alarm. The
Bottom Alarm is actually two different alarms. It
consists of a shallow alarm and a deep alarm. The shallow alarm
sounds a warning tone when the bottom
signal goes
shallower than the
alarm set point. The
deep alarm sounds
when the bottom
signal goes
deeper
than the alarm set point. Use the
shallow alarm to wam you of
shallow water. Use the deep alarm to alert
you to deeper
water,
such
as a drop-off.
The shallow
and deep alarms adjust identically. although through dif-
ferent menus.
To turn the Bottom Alarm on, first press the ALARM
key. Next, press
the
key adjacent to the "Bottom Alarm" label. The screen shown at the
top
of the next page appears. This is the Shallow Alarm and Deep
Alarm menu. Press the
key corresponding to the desired alarm. The
shallow alarm was
adjusted in this
example, so the
key adjacent to
the
18
Upper
Lower
Clear
54y
20°
40'
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