Furuno FMD-3100 Operator's Manual page 276

18. NAVIGATION SENSORS
Note: The integrity results appear in the [Local Sensor Setting] and [System Sensor
Setting] menus only if the menu item [Color of own ship's information(TEXT) will be
changed by result of integrity check] is checked during installation.
Passed: Data is available for comparison and data is normal.
Low Accuracy: Data signal strength is low, but data is normal.
Doubtful: Data is not available for comparison, but data is normal.
Failed: Data may or may not be available for comparison, and data is abnormal
Excluded: Data value changed significantly
Not Available: Sensor malfunction or data is improper.
Note: For heading data, if there is only one gyro connected, the judgment is "Doubtful"
when the speed is 10 kn or less because heading cannot be checked against COG. If
the speed is higher than 10 kn, COG can be checked against heading so the judgment
is "Passed".
The methods of integrity monitoring are outlined in the table below.
Sensor
Position
Heading
Speed over the
ground
Speed through
the water
Rate of turn
The status and integrity of all sensors can be monitored from the [Filter Status] page
in the [Other Sensor Settings] menu. Sensors can also be unselected and the filter re-
set from this page.
The [Status] column indicates sensor status as follows:
• [Selected] (sensor selected for use in filter)
• [Unselected] (sensor not used in filter)
18-10
• Comparison with other position sensors.
• Comparison with dead reckoning position.
• Comparison with other heading sensors.
• Comparison with a COG sensor (used only if other heading sen-
sors are not available and if COG is high enough).
• Comparison with other SOG sensors.
• Comparison with water speed sensors is a secondary option (used
only if other SOG sensors are not available).
• Comparison with other STW sensors.
• Comparison with SOG sensors is a secondary option (used only if
other STW sensors are not available).
• Comparison with other rate of turn sensors.
Passed
Passed
Passed
Doubtful
Passed
Passed
Comparison