LORAN-C Integration
This feature will be available only when the optional Loran-C license is purchased and
activated. The MX 51x has two selections for Loran-C integration (Raytheon and Locus).
Raytheon:
To implement this feature, change LORAN-C connected to Yes.
Identify the appropriate input port (1 or 2) that the LORAN-C device connects to by using
the Change softkey.
Select the appropriate Version Number with the range from 0 to 9.
The Antenna offset option of the LORAN-C feature is tied to the Antenna offset from
the GPS feature. Note that any changes you make to the Antenna offset in LORAN-C
will also modify the Antenna offset in the CFG1/GPS screen. The Antenna offset allows
you to virtually offset your antenna. That is, if you are forced to place the antenna in a
location other than where you want your position fix calculated (due to superstructure
or other high power antennas), you can place the antenna in a practical location. Enter
the appropriate Antenna offset, and the receiver will calculate your position in the place
where you would have preferred to place the antenna.
After the LORAN-C (Raytheon) feature is enabled, you will have 3 new screens (POS 4,
POS 5, POS 6), which display the following information:
POS 4 - GPS/LORAN-C Combined Position •
POS 5 - LORAN-C Calibrated Position
•
POS 6 - LORAN-C Stand Alone Position
•
The POS 4 screen displays the GPS/LORAN-C combined position and navigation modes
received from the $PMVX1 message (which is based on (D)GPS if GPS is available, and
based on (D)GPS calibrated LORAN-C position if GPS is not available) from the LORAN-C
receiver. The $PMVX1 message is formatted just like the NMEA GGA message, except
that its GPS quality indicator ranges from 0-5. The GPS quality indicator is displayed as a
navigation mode on the POS 4 screen.
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