My
wind,
depth and speed
instruments are
Raymarine Mn 100-2 wireless with a
hull receiver and transmitter. As they are
NMEA 0183 I use an Actisense NGW1 to pass the data into my
NMEA 2000 network where the data is successfully read by the plotter. The magnetic heading is supplied from a
sensor directly connected to the
nmea 2000 backbone. This is primarily for the
radar but the value is seen and correctly displayed on the chart plotter and by the
wind instruments via the NGW1. I use a DigitalYacht Navlink 2 to supply the
nmea 2000 data as 0183 to tablets and signal k/opencpn on the Raspberry Pi.
Now for the strange part. With the wind etc instruments turned off, the magnetic heading is seen by the Navlink 2 as $IIHDG,47.8,0.0,E,1.4,E*77 and is transmitted correctly to everything relying on the Navlink via the Wi-Fi router. As soon as the wind instruments are turned on this data is no longer transmitted and everything depending on the Navlink 2 displays only the last data, frozen. All
equipment on the
NMEA 2000 backbone sees the data correctly. There are no filters switched on the Navlink 2. One downside of this is that my own
boat displays on
opencpn as heading in a different direction to the COG. I’ve asked DigitalYacht if they can help given that the problem is downstream of their device but they haven’t replied.
Can anyone throw any light on why this is happening and how it may be remedied please.