Boat's sail in the apparent wind. I don't know how an instrument could figure out the true wind and direction without knowing the boat speed.
---------- Forwarded message ---------- > From: dwight veinot <dwight...@gmail.com> > To: "cnc-list@cnc-list.com" <cnc-list@cnc-list.com> > Cc: > Date: Thu, 13 Aug 2015 12:48:02 -0300 > Subject: Re: Stus-List Electronics upgrade > so my old Raymarine st 60 wind instrument gives me apparent wind speed and > angle and true wind speed and angle at the push of a button...I figured > those measurements were close enough to accuarte to be good enough for my > sailing needs...I don't think boat speed or heading or anything else is > required...are the newer units different > > Dwight Veinot > C&C 35 MKII, *Alianna* > Head of St. Margaret's Bay, NS > d.ve...@bellaliant.net > > > On Thu, Aug 13, 2015 at 11:22 AM, Michael Brown via CnC-List < > cnc-list@cnc-list.com> wrote: > >> As far as I know if you have AWS and AWA you only need boat speed through >> the water >> to get TWS and TWA which is shown by True on the i60 wind. >> >> If you want to display the magnetic angle from where the wind is coming >> from, such as >> on an old ST50 multidisplay, then you need boat heading which comes from >> the fluxgate >> compass ( usually connected to the Autohelm ). >> >> Michael Brown >> Windburn >> C&C 30-1 >> >> Date: Wed, 12 Aug 2015 13:24:55 -0300 >> From: Ken Heaton <kenhea...@gmail.com> >> To: cnc-list <cnc-list@cnc-list.com> >> Subject: Re: Stus-List Electronics upgrade >> Message-ID: >> <CAAbfP6QiGDUfVKUJ7_q4WOE=OUVDP=jcu7q3ppcs9b_zj-y...@mail.gmail.com> >> Content-Type: text/plain; charset="utf-8" >> >> Sorry Fred, I wasn't clear. >> >> I was referring to the true wind display on a Raymatine i60 Wind. >> Raymarine Tech online says it needs a source of heading (and speed >> through >> the water which it gets from the i50 Speed already installed) to be able >> to >> display true wind? >> >> What are possible sources for heading? Can my old Simrad/Robertson >> Autopilot provide that info to the i60 with some sort of NMEA 0183 to >> SeaTalkng converter? >> >> Ken H. >> >> >> _______________________________________________ >> >> Email address: >> CnC-List@cnc-list.com >> To change your list preferences, including unsubscribing -- go to the >> bottom of page at: >> http://cnc-list.com/mailman/listinfo/cnc-list_cnc-list.com >> > >
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