Bill,

I have installed a Maretron WSO and interfaced (via Simrad AT10) to a
Furuno 1920C. Everything works as expected except that wind direction
can only be displayed in relative/apparent on the Furuno unit.

The Maretron DSM200 will display the wind in Relative or True. The WSO
unit sends out wind data with Relative reference. If a heading device
is present on the N2k network then True will be calculated and
displayed by/on the DSM200 unit. Actually in this configuration the
heading device is on the Navnet side and the heading data is being
converted/passed to the N2k network via the AT10.

I talked to Furuno support and they told me that the 1920C unit expects
to receive wind information in the appropriate MWV (R or T) sentence.
The MWV/R sentence (from the WSO) is being passed to the Furuno unit
and therefore that is what is being displayed, they do not calculate
True from heading information.

The DSM200 being a display head device does not pass on any calculated
information.

Regards,

Bill