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Old 13-11-2017, 23:33   #1
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NMEA Sentence HDG

Hi,

how does OC exactly work with the nmea sentence HDG?
Does OC use the values for devitation and variation or does OC just use the value for the heading and calculate then with the WMM plugin?

Thanks and regards

Andreas
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Old 14-11-2017, 04:20   #2
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Re: NMEA Sentence HDG

Quote:
Originally Posted by Andreas29 View Post
Hi,

how does OC exactly work with the nmea sentence HDG?
Does OC use the values for devitation and variation or does OC just use the value for the heading and calculate then with the WMM plugin?

Thanks and regards

Andreas
If HDG message also contains the variation and E/W flags then O will use that. If not then it will look in RMC message for a variation. If nothing there it will use WMM plugin unless user has selected the variation manually in options.
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Old 14-11-2017, 15:14   #3
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Re: NMEA Sentence HDG

TDan...

Nicely stated.

Thanks
Dave
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Old 14-11-2017, 22:01   #4
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Re: NMEA Sentence HDG

Hi,

@transmitterdan: Thanks.

Regards

Andreas
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Old 15-11-2017, 12:50   #5
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Re: NMEA Sentence HDG

Added to FAQ, did not know where else to put it.

https://opencpn.org/wiki/dokuwiki/do..._sentence_work

also added here
https://opencpn.org/wiki/dokuwiki/do...nmea_sentences

Quote:
Originally Posted by transmitterdan View Post
If HDG message also contains the variation and E/W flags then O will use that. If not then it will look in RMC message for a variation. If nothing there it will use WMM plugin unless user has selected the variation manually in options.
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