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16. NAVIGATION SENSORS
16-7
16.4 Primary and Secondary Positions of Own Ship
The system has two different positions for own ship: System position, primary position
and secondary position.
• Primary position: Position generated by position source chosen as primary posi-
tion source.
• Secondary position: Position generated by position source chosen as secondary
position source.
The position source for primary position of own ship is chosen as Primary on the
[POSN] page of the [Sensor] menu.
The position source for secondary position of own ship is chosen as Secondary on the
[POSN] page of the [Sensor] menu. Secondary position of own ship is not available as
latitude/longitude value for the user.
Primary and secondary positions of your ship may be
plotted on the chart display with the past tracks fea-
ture. You can control their visibility, etc. from the
[Tracking] page of the [Symbol Display] menu, shown
in the right figure. In this example, past tracks are plot-
ted using the primary position-fixing equipment.
Secondary position
of own ship
is is not valid
Position sensor
selected as
Secondary
Valid data exists
Position sensor
selected as priority
lower than
Secondary
Secondary
position of
own ship
used by
this system
No valid data
Valid data exists
No valid data