Operation Manual
FarSounder, Inc.
F31552 (Rev. 3.8.0)
Page 41 of 69
Manager options, the user can select between displaying the Profile Selector bearing relative to either the
vessel or the absolute heading.
5.4. Forward Looking Alarm Use
The user can define an alarm which will automatically notify the user of potentially hazardous obstacles.
The user can define the area of surveillance for the alarm by depth, minimum range, maximum range, and
field-of-view angle width. The user is notified by both visual and audible notifications. Additionally, the user
can specify the number of hits before the alarm is triggered.
Figure 39. Alarm volume shown in red
Alarm Operation
Once configured, the alarm is simple to use. The alarm can be turned on by clicking the "Alarm" button in
the Menu Bar at the top of the 3D Sonar Display window. Once active, the alarm conditions will take effect.
The alarm will ONLY be triggered if the button is set to active. When active, the alarm button is depressed.
Figure 40. Alarm acknowledge button
Should the alarm be triggered, a warning will sound, the 3D Sonar Display window will blink blue, and an
alarm acknowledge message box will appear in the lower left corner of the sonar viewer window. Simply click
the "acknowledge alarm" message box to acknowledge and temporarily silence the alarm. For example,
the vessel may be passing by a shallow area which triggers the alarm. After the user acknowledges the
alarm, it will not sound again even if alarm conditions are met until the alarm acknowledge time of thirty
seconds has passed. If alarm conditions still exist after the alarm acknowledge time has passed, the alarm
will sound again.
Alarm Configuration
The user definable alarm is configured via the 3D Sonar Display's Configuration Manager menu. When
configuring the alarm, the user can define the volume of water within which targets will trigger the alarm.
The trigger area is defined to be the volume of water bounded by 4 thresholds: Field-of-View (FOV) angle,
Max Range, Min Range and Max Depth.