Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 16-05-2015, 06:28   #1
Registered User
PietDeVries's Avatar

Join Date: May 2015
Location: Netherlands
Boat: Hutting 45
Posts: 4
Choose heading source

I've got a small issue, not that important but just annoying me. My ship has a gyrocompass which is part of the instrument network and outputting NMEA heading.
However, OpenCPN seems to insist on using the GPS heading. My GPS sends out the heading as a separate sentence, so I disabled this sentence in the filter, but OpenCPN still refuses to use the gyro heading.
It looks like OpenCPN is calculating the heading itself from the GPS position changes, is this true? And how can I force it to use the gyro heading?



PietDeVries is offline   Reply With Quote
Old 16-05-2015, 06:43   #2
Registered User
FamilyVan's Avatar

Join Date: Nov 2014
Posts: 1,779
Re: Choose heading source

That sucks. That would really annoy me too, if I had a Gyro, and I was forced to use the GPS heading. I have no recommendations but I understand your frustration.

Sent from my SGH-I547C using Cruisers Sailing Forum mobile app

FamilyVan is offline   Reply With Quote
Old 16-05-2015, 08:39   #3
Registered User

Join Date: Nov 2012
Location: Orust Sweden
Boat: Najad 34
Posts: 1,593
Re: Choose heading source

For me it seems you're talking about two different values?
The HDG or if equipped with a variation table, the HDT from the compass which is used to for example a heading line and;
The COG from the GPS which is used to show course over ground.

To see the heading line you've to give an arrow length in Own ship tools.

Which NMEA sentences are you receiving from the compass?
Hakan is online now   Reply With Quote
Old 16-05-2015, 09:39   #4
Registered User
PietDeVries's Avatar

Join Date: May 2015
Location: Netherlands
Boat: Hutting 45
Posts: 4
Re: Choose heading source

I was mostly talking about the own ship pointer.
Obviously the dashboard displays give their respective headings, but for example when the ship is moored, the pointer (and the vector) was just going around in circles.
But as is always the case with these things, I just booted up everything again and now suddenly the right heading is being used. Could be related to which instrument's data OpenCPN receives first maybe? I'll try next time it's not working Thanks for the thinking anyway.

PS: the correct sentence was $IIHDG,250.3,,,,*4E
PietDeVries is offline   Reply With Quote


Thread Tools
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
If you could pick anything, what would you choose? schoonerdog Multihull Sailboats 276 22-02-2013 16:53
Which cat to choose in the 47 to 52 range California Cat Man Multihull Sailboats 34 31-05-2008 09:58
new to forum, new to sailing, now to choose on a boat.. :) Capt Darren Meets & Greets 5 16-06-2007 06:16
Handheld GPS - How to Choose? markpj23 Marine Electronics 4 09-02-2006 05:04
Blisters or Flooding? Which would you choose?? ssullivan General Sailing Forum 30 22-06-2005 01:36

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 05:27.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.