Eagle Electronics FISHMARK 640C - Manual (Page 60)

54
Sonar Menu (left) with Sonar Features selected. In the Sonar
Features menu (center) the SeaFinder's Noise Rejection feature is se-
lected with ASP in the default low setting. The Noise Rejection feature
(far right) is set the same in the FishMark unit.
To change the ASP level:
1. From the Sonar Page press MENU |
↓ to
S
ONAR
F
EATURES
| ENT .
2. Press
↓ 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. This is useful as an anchor watch, a shallow water alert
or for navigation.