Furuno FEA-2807 - Primary and Secondary Positions of Own Ship

19. Navigation Sensors
19-6
19.4 Primary and Secondary Positions of Own Ship
The system has three different positions for your ship: System position, primary position and secondary position:
• System position: Used for navigation and steering. See section 19.3 "Source of Position".
• Primary position: Position generated by position source selected as primary position source.
• Secondary position: Position generated by position source selected as secondary position source.
The position source for primary position of your ship is selected either as Primary or as Pri no alert on the POSN
page of the Sensors dialog box.
The position source for secondary position of your ship is selected either as Secondary or as Sec no alert on the
POSN page of the Sensors dialog box. Secondary position of your ship is not available as latitude/longitude value
for the operator.
GPS in diff. mode
or SYLEDIS
selected as
SECONDARY
Any other than
GPS in diff. mode
or SYLEDIS
selected as
SECONDARY
Secondary
position
of the
own ship
used by
the system
Selected and position exists
Secondary position
of own ship is
is not valid
Selected and
position exists
Not selected
or no position
Not selected
or no position
System, primary and secondary positions of your
ship may be plotted on the ECDIS display with the
Past tracks feature. You can control their visibility
from the Tracking page of the Symbol Display
dialog box, shown right. In this example, past
tracks are plotted using Ship system position,
Primary and Secondary position sources.
Symbol Display