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SSC200 User’s Manual
Page D2 Appendix D – Transmitting True Heading Data Revision 1.8
$PMAREXE,SSC200,,5D,0,<variation>,,
Where <variation> is the magnetic variation in units of degrees and resolution in tenth of degrees –
positive values represent easterly variation, and negative values represent westerly variation.
For example, to program the SSC200 with 18.0° easterly magnetic variation, as might be seen in Seattle,
WA, USA, type the sentence:
$PMAREXE,SSC200,,5D,0,18.0,,
To program the SSC200 with 5.5° westerly magnetic variation, as might be seen on the east coast of
Florida, USA, type the sentence:
$PMAREXE,SSC200,,5D,0,-5.5,,
5. The SSC200 should now be transmitting true heading data. Examine the NMEA 0183 sentences coming
from the SSC200 or check the heading indication on the system connected to the NMEA 0183 output of
the SSC200 for true heading data.