Eagle Electronics FISHMARK 640C - Manual (Page 61)

55
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 off the digital bottom depth signals. No other targets will trip these
alarms. These alarms can be used at the same time or individually.
Main Menu (left) with Sonar Alarms highlighted.
The Sonar Alarms menu is shown at right.
To adjust and turn on the Shallow Alarm:
1. Press ALARM |
→ to Shallow Alarm
D EPTH
| ENT .
2. Press
↑ or ↓ to change the first number, then press → to move the
cursor to the next number and repeat until the depth is correct, then
press
ENT .