"Who Me" wrote in message
...
I am trying to get True Wind from my ST40 Wind instrument.

I am using a Raymarine E85001 SeaTalk/NMEA converter box to take the NMEA
0183 output from my Garmin GPSMAP175 GPS and send it to the ST40 Wind.

Connecting a PC to the RS232 terminals of the E85001 shows that both
instruments are talking to the E85001, but the ST40 Wind still does not
compute true wind. The GPS is sending NMEA sentences VTG and RMC which
both have boat speed information in them, so I don't understand why the
ST40 won't use it. I've tried choosing different NMEA output settings on
the GPS, and the sentences change slightly, but the ST40 still ignores the
boat speed info.

The ST40 is talking happily to my ST1000+ AutoHelm, and the AutoHelm is
also receiving track data from the GPS (directly, not through the E85001),
so it seems only the ST40 Wind doesn't want to play ball :-(

I've tried contacting Raymarine but it's been nearly two weeks now, and
they still haven't replied to my query, though I live in hope.

Anyone got any ideas what might be going on?

Who.

I've tried contacting Raymarine but it's been nearly two weeks now, and
they still haven't replied to my query, though I live in hope.

Did you send a note to technical assistance from their web page? I sent
them a note yesterday asking if GPS waypoint data would be picked up by
Seatalk and then tranlsated back to NMEA format by the E85001 and they
phoned me today with an answer. (unfortunately the answer is no and therefor
I must run a separate wire from my GPS to my radar). I was put in touch
with

Winston Savage
Technical Support Specialist
Rayamrine Inc.
http://www.raymarine.com

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