Eagle Electronics FISHMARK 320 - Manual (Page 50)

46
To change the ASP level:
1. From the Sonar Page, press
MENU |
↓ to
S
ONAR
F
EATURES
| ENT .
2. Press
→ ↓ or ↓ to
N
OISE
R
EJECTION
| ENT .
3. Press
↓ or ↑ to select a setting, then press
ENT .
4. To return to the previous page, press EXIT | EXIT .
Alarms
This unit has three different types of sonar
alarms. The first is the Fish Alarm. It sounds
when the Fish I.D.
 feature determines that
an echo is a fish.
Another alarm is the Zone Alarm, which
consists of a bar on the side of the screen. Any
echo on the chart that appears inside this bar
triggers this alarm.
The last alarm is the Depth Alarm, which has both a Shallow and a
Deep setting. Only the bottom signal will trigger this alarm. This is
useful as an anchor watch, a shallow water alert or for navigation.
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 set-
ting. For example, if you set the shallow alarm to 10 feet, the alarm will
sound a tone if the bottom signal is less than 10 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. These alarms can be used at the same time or individually.