DSM250 User’s Manual
Page 162 Revision 1.4.16a
information regarding the magnetic variation at the current location is required. Please see the
SSC200 User’s Manual for more details on the use of magnetic variation by the SSC200 compass.
By default, the SSC200 is capable of receiving variation information on either its NMEA 0183 or
NMEA 2000
®
interfaces. This causes the SSC200 to use variation data from either the NMEA 0183
interface or the NMEA 2000
®
interface.
Figure 177 – Setting Variation Source to NMEA 0183 or NMEA 2000
®
(factory default)
You should need to alter this setting only if:
• There are variation sources available on both the NMEA 2000
®
and NMEA 0183 interfaces, or
• There is no magnetic variation source available.
If variation sources are available on both the NMEA 2000
®
and NMEA 0183 interfaces, you must tell
the SSC200 which source to use. Figure 178 below shows the NMEA 0183 source selected. This
causes the SSC200 to use variation data from the NMEA 0183 interface and ignore all other variation
sources (i.e., NMEA 2000
®
interface and manual entries).
Figure 178 – Setting Variation Source to NMEA 0183 Only
