C80 magnetic variation

[Chuck - Raymarine - Moderator]

Brian,

Your diagram is very helpful and correctly specifies the interfaces for all but one device within the system. While the two daisy chained i70 MFIDs are linked via a SeaTalkng Spur Cable, they will actually communicate via SeaTalk when interfaced to the system in the manner shown ... this is not indicative of a problem. However, unlike Raymarine's currently manufactured products, the C-Series Classic MFDs, ST60 Instruments, and PC/SeaTalk/NMEA 0183 Interface Module did not feature support for multiple sources of any one type of data. Whereas the system features a source of heading data (i.e. the S2G autopilot) the KVH compass should not also be interfaced to the system. If seeking to provide the MFD with 10Hz stabilized heading data, then the S2G's NMEA 0183 Port 1 OUT terminals should be interfaced to the NMEA 0183 input port of the MFD. It is further recommended that you verify that each of the i70 MFIDs has been updated with v3.08 or later i70/i70S software.