From: C400@Catalina400-445.groups.io <C400@Catalina400-445.groups.io> On Behalf Of Steve Miller via groups.io
Sent: Saturday, October 30, 2021 12:44 AM
To: C400@catalina400-445.groups.io
Subject: [EXTERNAL] Re: [C400] B&G AWS & TWA not working

 



You may know this already, so apologies if it's redundant.  But true wind speed and direction are computed by your instruments by doing vector math with your apparent wind speed and direction as well as your speed over water.  If your true wind is incorrect, ensure that you're getting the right readings from both those instruments.

 

If apparent wind speed is always zero, start at your masthead and see if the cups are turning, then work your way down.  Also, look at your instrument config to validate it's using the right instrument to source the apparent wind speed.  My B&G gear every so often gets confused as to which instrument is providing GPS and I have to reconfigure.

 

Hopefully this won't force a trip up the mast, but that'd be my guess.  Good luck!

 

Craig

Hull 244

 

On Fri, Oct 29, 2021 at 9:08 PM Steve Miller <stephenmiller@...> wrote:

I had a similar situation when some fishing line (somehow) wrapped around my anemometer but not the direction indicator. So with the anemometer stationary, whenever the boat was moving the computer figured the true wind had to be from astern at the boat’s speed, while the apparent wind direction was as-indicated, but aws was 0. 

On Oct 30, 2021, at 05:56, ryck J <ryckjohnson@...> wrote:

Hi All,
Recently my Aparent Wind Speed (AWS) and True Wind Angle (TWA)stopped working. 
TWA always indicates 180 degrees and AWS is always zero.

Any idea what has failed?

Appreciate any help!

Ryck
SV Cravn Wind #169

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