Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 09-04-2020, 01:29   #1
Registered User

Join Date: Dec 2009
Location: New Bern, NC. Marina Tel Aviv
Boat: May Flower 48 - Stadel 48
Posts: 176
Send a message via Skype™ to Jack C
Question Raymarine C95 displays incorrect apparent wind speed

I have a 2015 Raymarine C95 MFD connected to a 2005 Raymarine C70 MFD via NMEA0183.
The C70 has a Seatalk (1) network connected to a Raymarine Wind Speed instrument ST60.
The wind speed shows correct apparent wind direction and speed on its display as does the C70.
The C95 shows direction accurately but the wind speed shows about 3 knots when the instrument shows about 5.6 knots. The ration between the speeds is about the same over different wind speeds.
The C95 is getting the wind speed and direction via the same NMEA0183 sentence MWV.
I disabled all NMEA0183 sentences from the C70 apart from the MWV output and observed the sentence received on the C95. It showed the correct speed and angle while the C95 display showed an incorrect speed.
To me this showed that the C95 is using the MWV and that it is receiving the correct value but displaying an incorrect value.
My assumption is that the C95 has a bug in its display software.
The C95 uses the Lighthouse II operating system. The version in the C95 was old so I downloaded the latest version (R19) and updated the C95. I searched the revision notes for mention of wind speed and found nothing.
Same problem with version 19.
I searched the Raymarine Forum and found nothing relevant. I posted on the Raymarine Forum but who knows with COVID-19 when the post will be "moderated".
I find it hard to believe that no one has reported the same problem so I checked the following:
The C95 is set to knots and the MWV message shows knots.
Perhaps the C95 is very intelligent and is translating mast head speed to cockpit (ground) speed? So I checked the boat setup to see if there is a setting for mast height. There is none, so perhaps there is a factor that its using?
Next I searched the C95 users manual and found a setting for wind damping. This setting affects both angle and wind speed. 1 is the slowest and 15 is the fastest, the default is 12. My C95 is set to 12 for both speed and angle. Changing it to 15 made no difference.
Jack C is offline   Reply With Quote
Old 17-04-2020, 12:17   #2
Registered User

Join Date: Dec 2009
Location: New Bern, NC. Marina Tel Aviv
Boat: May Flower 48 - Stadel 48
Posts: 176
Send a message via Skype™ to Jack C
Re: Raymarine C95 displays incorrect apparent wind speed

Anyone know how to post successfully on the Raymarine Forum. I tried, looks like they are selective in what they receive. And again, anyone has any suggestions about my problem?
Jack C is offline   Reply With Quote
Old 17-04-2020, 12:43   #3
Moderator
 
Pete7's Avatar

Cruisers Forum Supporter

Join Date: Aug 2009
Location: Solent, England
Boat: Moody 31
Posts: 15,704
Images: 14
Re: Raymarine C95 displays incorrect apparent wind speed

Quote:
Originally Posted by Jack C View Post
Anyone know how to post successfully on the Raymarine Forum. I tried, looks like they are selective in what they receive. And again, anyone has any suggestions about my problem?
Some of there moderators are UK based and it does take them a couple of days to approve posts I have made in the past. However, with the lockdown in the UK they made not be working as it's not "essential work".

Pete
Pete7 is offline   Reply With Quote
Reply

Tags
marine, raymarine, wind

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
OpenCPN Manual on Ground Wind, True Wind, Apparent Wind Dockhead OpenCPN 11 15-08-2018 20:15
Raymarine C95 plotter stuck in MPH! Zaria Navigation 2 27-09-2017 21:31
OCPN receiving incorrect Apparent Wind Angle affinite OpenCPN 5 13-06-2016 01:22
Garmin 820 vs Raymarine c95 RCK Forum Tech Support & Site Help 0 11-01-2015 06:31
Raymaarine C90W vs Raymarine C95 chef2sail Navigation 7 17-08-2012 04:18

Advertise Here


All times are GMT -7. The time now is 12:58.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.