diff options
| author | Eric S. Raymond <esr@thyrsus.com> | 2014-05-16 11:16:48 -0400 |
|---|---|---|
| committer | Eric S. Raymond <esr@thyrsus.com> | 2014-05-16 11:21:03 -0400 |
| commit | b5c687b0425e19cf87add2264a408ca0f8270e10 (patch) | |
| tree | c39806fc941a758e31d316fc787b38c3112381ad /www | |
| parent | 042a6e6bfa01966848550c4c5f751e57259ab88e (diff) | |
| download | gpsd-b5c687b0425e19cf87add2264a408ca0f8270e10.tar.gz | |
Support for, and documentation of, some unuusual AIS talker IDs.
Diffstat (limited to 'www')
| -rw-r--r-- | www/AIVDM.txt | 19 | ||||
| -rw-r--r-- | www/NMEA.txt | 2 |
2 files changed, 19 insertions, 2 deletions
diff --git a/www/AIVDM.txt b/www/AIVDM.txt index ee684727..7fa33e25 100644 --- a/www/AIVDM.txt +++ b/www/AIVDM.txt @@ -1,6 +1,6 @@ = AIVDM/AIVDO protocol decoding = Eric S. Raymond <esr@thyrsus.com> -v1.44, November 2013 +v1.45, May 2014 This document is mastered in asciidoc format. If you are reading it in HTML, you can find the original at the GPSD project website @@ -234,6 +234,21 @@ nonempty message ID field: !AIVDM,2,2,3,B,1@0000000000000,2*55 -------------------------------------------------------------------- +== Talker IDS == + +The AI prefix commonly found on these sentences is an NMEA talker ID +for a mobile AIS station. Other + +.AIS talker IDs +[width="25%",frame="topbot",options="header"] +|================================================ +| !AI | Mobile AIS station +| !BS | Base AIS station (deprecated in NMEA 4.0) +| !AB | NMEA 4.0 Base AIS station +| !AN | NMEA 4.0 Buoy AIS station +| !AX | NMEA 4.0 Repeater AIS station +|================================================ + == AIVDM/AIVDO Payload Armoring == The data payload is an ASCII-encoded bit vector. Each character @@ -5287,3 +5302,5 @@ waterways. Also Inland AIS standard messages are now covered. Version 1.44 adds substantial new information on MMSIs and updates the <<MMSI link>>, which was stale. + +Version 1.45 adds a description of AIS talker IDs. diff --git a/www/NMEA.txt b/www/NMEA.txt index 5a6f9666..1fcb2557 100644 --- a/www/NMEA.txt +++ b/www/NMEA.txt @@ -628,7 +628,7 @@ to POINTB does not change during the time you are on this leg.) 12 1 2 3 4 5 6 7 8 9 10 11| 13 14 | | | | | | | | | | | | | | - $--BEC,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x.x,T,x.x,M,x.x,N,c--c,m,*hh<CR><LF> + $--BWC,hhmmss.ss,llll.ll,a,yyyyy.yy,a,x.x,T,x.x,M,x.x,N,c--c,m,*hh<CR><LF> ------------------------------------------------------------------------------ Field Number: |