Furuno FMD-3200 Operator's Manual page 250

18. NAVIGATION SENSORS
For heading data, If there is only one gyro, the judgement is "Doubtful" when the ship
is stopped because there is no COG for comparison. When the ship begins to move,
the judgement is changed to "Passed" because there is COG for comparison.
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)
• [Not Available] (no sensor information)
• [Excluded] (automatically excluded sensor)
The [Integrity] column indicates sensor integrity as either [Passed] (green characters)
or [Failed] (red characters). The integrity evaluation is [Doubtful] (yellow characters)
when there are no other sensors to compare with.
The [Comparisons] column shows the sensors compared and the integrity evaluation
of compared sensors in parentheses. Using the illustration above as an example,
SOG/COG data fed from GP0002 is compared with the sensors GP0001 and VD0001.
The integrity evaluation for the compared sensors is [Passed].
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.
Comparison