My Hanse 342 has a SimNet network installed with three IS20 Graphic and one IS20 Wind instrument. In the system there is also a IS20 masthead unit, a compass sensor, a GPS antenna and Maretron DST100 hull sensor. Now, I am not fully satisfied with the wind instrument and am looking to replace it with another brand. Since SimNet is NMEA2000, compatibility should not be a problem. I have already looked at the Garmin GMI10, which I have written about in another post in this forum.
Even if NMEA2000 is meant to be "plug-and-play" I see one major problem with choosing another brand. All calculated wind information, such as True Wind etc, is calculated from boat speed but the calibration of the boat speed is stored in the instruments and not in the sensors unlike, for example, depth. In the network only the measured boat speed is distributed and not the calibrated one.
When I calibrate the boat speed in one of my IS20 Graphics the wind information on the Wind instrument will change accordingly. It is not, however, possible to make the calibration in the Wind instrument itself so if I were to put the instrument in a network that would not have any Simrad instruments I would not be able to calibrate the boat speed in order to make the IS20 Wind instrument show the correct wind information.
The reason I have previously been looking at Garmin's GMI10 is that it is also capable of showing boat speed, which therefore must be possible to be calibrated. I have also looked at Furuno and Raymarine but I have not been able to retrieve enough information about their instruments to judge whether the boat speed can be calibrated in their wind instruments.
Has anyone else tried to combine instruments from different brands the way I am describing above?
Hanse 342 #306, S/Y Emilia