Re: xgps & AIS Data

[Gary E. Miller]

Yo Владимир!

On Mon, 13 Apr 2020 15:41:58 +0300
Владимир Калачихин <address@hidden> wrote:

> 13.04.2020 14:54, Владимир Калачихин пишет:
> > In the file test/daemon/ais-nmea.log.chk lines:
> > 5,60,262,484,607,644,891,897,985,1123,1325,1344,1366,1380,1575,1623,1718
> >   - no have the spatial data.  
> 
> Sorry, it is a "Static & Voyage Data", and it is correct.

That was also my understanding from the standard (Rec. ITU-R  M.1371-4)

So this still looks wrong to you?

> Lines:
> 911,1362,1370,1386,1589
>   - has wholly strange data.

I think this is 911:

{"class":"AIS","type":8,"repeat":0,"mmsi":215441000,"scaled":false,"dac":200,
"fid":10,"vin":"04809190","length":1350,"beam":114,"shiptype":8440,
"shiptype_text":"Illegal ship type value.","hazard":5,
"hazard_text":"Unknown","draught":165,"loaded":0,
"loaded_text":"N/A (default)","speed_q":false,"course_q":false,
"heading_q":false}^M

Here is doc on message 8, doc 200, fi 10:
http://www.e-navigation.nl/content/inland-ship-static-and-voyage-related-data

I'm not sure how to read that...

Looks like shiptype is 14 bits.

I found a reference to shiptypes:
  https://api.vtexplorer.com/docs/ref-aistypes.html

But it only goes to 99.  Is shiptype 8440 wrong?
8440 can fit in 14 bits, so not obviously illegal.

The other fields look good to me.  Not that I understand AIS at all.

RGDS
GARY
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Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
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