These are the frequencies of DAC FID pairs in AIS Message 6 in data coming over AISHUB. 1586084 messages were recorded and analysed with R. With the pages from Arundale, gpsd and VT-Explorer a guess was made about the content of some of these messages.
Many messages have seemingly non documented DAC FID pairs.
What follows are a pie chart of the messages with a frequency > 10000 and a table of all recorded DAC FID pairs.

DAC | FID | freq | Definitions |
---|---|---|---|
235 | 10 | 625827 | UK AtoN Status |
1 | 2 | 405584 | International Interrogation on specific IFM |
0 | 29 | 174600 | Test only |
1 | 40 | 120646 | International Number of Persons on board |
0 | 0 | 75734 | Test only |
0 | 22 | 67493 | Test only |
0 | 20 | 32952 | Test only |
1 | 3 | 23080 | International Capability interrogation |
1 | 0 | 12872 | International Text Telegram |
200 | 3 | 6507 | Inland Waterways ?Capability interrogation? |
201 | 5 | 5136 | Albania |
431 | 31 | 5044 | Japan |
265 | 10 | 4936 | Sweden |
316 | 2 | 4545 | Canada Vessel/Lock Scheduling |
990 | 0 | 3938 | AtoN |
990 | 10 | 3058 | AtoN |
200 | 55 | 3027 | Inland Waterways number of persons on board |
1 | 4 | 2654 | International Capability interrogation reply |
990 | 1 | 2196 | AtoN |
232 | 1 | 1937 | United Kingdom ferries within Port of London Authority |
133 | 12 | 1521 | ? |
431 | 9 | 893 | Japan |
503 | 10 | 462 | Australia |
265 | 60 | 412 | Sweden |
1 | 19 | 245 | International Marine Traffic Signal |
990 | 40 | 164 | AtoN |
2 | 0 | 43 | |
990 | 38 | 41 | AtoN |
211 | 0 | 32 | Germany |
1 | 1 | 26 | International Application acknowledgement |
2 | 32 | 23 | |
1 | 30 | 22 | International Text Description - addressed |
1 | 28 | 14 | International Route Information addressed |
1 | 5 | 10 | International |
2 | 2 | 9 | |
0 | 34 | 8 | |
677 | 0 | 7 | Tanzania |
1 | 36 | 6 | International |
506 | 21 | 6 | Myanmar |
861 | 2 | 5 | |
457 | 0 | 4 | Mongolia |
504 | 4 | 4 | |
504 | 16 | 4 | |
576 | 0 | 4 | Vanuatu |
0 | 14 | 3 | Test only |
1 | 12 | 3 | International |
1 | 16 | 3 | International |
1 | 34 | 3 | International |
9 | 2 | 3 | |
29 | 2 | 3 | |
305 | 0 | 3 | Antigua and Barbuda |
477 | 0 | 3 | Hong Kong |
507 | 21 | 3 | |
714 | 19 | 3 | |
974 | 32 | 3 | Emergency position-indicating radiobeacon station |
3 | 34 | 2 | |
10 | 11 | 2 | |
60 | 46 | 2 | |
142 | 42 | 2 | |
211 | 10 | 2 | Germany |
249 | 0 | 2 | Malta |
251 | 29 | 2 | Iceland |
256 | 0 | 2 | Malta |
285 | 2 | 2 | |
387 | 10 | 2 | |
505 | 21 | 2 | |
520 | 8 | 2 | Fiji |
549 | 2 | 2 | |
567 | 0 | 2 | Thailand |
765 | 2 | 2 | Suriname |
784 | 22 | 2 | |
828 | 46 | 2 | |
901 | 18 | 2 | |
909 | 2 | 2 | |
961 | 2 | 2 | |
965 | 2 | 2 | |
0 | 2 | 1 | Test only |
0 | 32 | 1 | Test only |
1 | 9 | 1 | International |
1 | 22 | 1 | International |
1 | 38 | 1 | International |
1 | 50 | 1 | International |
1 | 62 | 1 | International |
2 | 34 | 1 | |
2 | 36 | 1 | |
2 | 40 | 1 | |
2 | 61 | 1 | |
3 | 0 | 1 | |
3 | 2 | 1 | |
3 | 6 | 1 | |
3 | 32 | 1 | |
3 | 40 | 1 | |
6 | 56 | 1 | |
7 | 18 | 1 | |
9 | 40 | 1 | |
9 | 56 | 1 | |
9 | 57 | 1 | |
10 | 32 | 1 | |
11 | 24 | 1 | |
13 | 22 | 1 | |
14 | 1 | 1 | |
14 | 43 | 1 | |
20 | 47 | 1 | |
26 | 9 | 1 | |
32 | 32 | 1 | |
43 | 35 | 1 | |
48 | 57 | 1 | |
60 | 3 | 1 | |
62 | 55 | 1 | |
64 | 23 | 1 | |
65 | 2 | 1 | |
66 | 0 | 1 | |
72 | 29 | 1 | |
82 | 63 | 1 | |
88 | 53 | 1 | |
91 | 28 | 1 | |
96 | 4 | 1 | |
102 | 35 | 1 | |
109 | 26 | 1 | |
110 | 22 | 1 | |
114 | 39 | 1 | |
118 | 26 | 1 | |
122 | 59 | 1 | |
126 | 34 | 1 | |
129 | 34 | 1 | |
130 | 2 | 1 | |
145 | 15 | 1 | |
146 | 40 | 1 | |
152 | 25 | 1 | |
154 | 11 | 1 | |
156 | 49 | 1 | |
156 | 56 | 1 | |
160 | 20 | 1 | |
163 | 26 | 1 | |
169 | 39 | 1 | |
179 | 29 | 1 | |
185 | 59 | 1 | |
186 | 14 | 1 | |
192 | 2 | 1 | |
194 | 1 | 1 | |
204 | 48 | 1 | Azores |
212 | 0 | 1 | Cyprus |
219 | 55 | 1 | Denmark |
221 | 2 | 1 | |
223 | 34 | 1 | |
227 | 10 | 1 | France |
228 | 29 | 1 | France |
236 | 0 | 1 | Gibraltar |
241 | 38 | 1 | Greece |
241 | 44 | 1 | Greece |
242 | 3 | 1 | Morocco |
243 | 10 | 1 | Hungary |
246 | 6 | 1 | Netherlands |
254 | 63 | 1 | Monaco |
256 | 45 | 1 | Malta |
272 | 7 | 1 | Ukraine |
274 | 20 | 1 | The Former Yugoslav Republic of Macedonia |
274 | 25 | 1 | The Former Yugoslav Republic of Macedonia |
279 | 33 | 1 | Serbia |
283 | 8 | 1 | |
289 | 16 | 1 | |
289 | 17 | 1 | |
294 | 0 | 1 | |
302 | 26 | 1 | |
303 | 0 | 1 | Alaska |
307 | 22 | 1 | Aruba |
312 | 0 | 1 | Belize |
313 | 42 | 1 | |
314 | 6 | 1 | Barbados |
314 | 32 | 1 | Barbados |
316 | 14 | 1 | Canada PAWSS Hydro/Current |
316 | 41 | 1 | Canada |
319 | 50 | 1 | Cayman Islands |
322 | 31 | 1 | |
323 | 14 | 1 | Cuba |
330 | 42 | 1 | |
333 | 5 | 1 | |
336 | 20 | 1 | Haiti |
339 | 19 | 1 | Jamaica |
341 | 21 | 1 | Saint Kitts and Nevis |
345 | 54 | 1 | Mexico |
346 | 47 | 1 | |
350 | 23 | 1 | Nicaragua |
350 | 63 | 1 | Nicaragua |
362 | 17 | 1 | Trinidad and Tobago |
369 | 55 | 1 | United States of America USCG - Encrypted Text Message |
371 | 32 | 1 | Panama |
376 | 24 | 1 | Saint Vincent and the Grenadines |
376 | 44 | 1 | Saint Vincent and the Grenadines |
379 | 48 | 1 | United States Virgin Islands |
381 | 28 | 1 | |
384 | 34 | 1 | |
384 | 38 | 1 | |
388 | 8 | 1 | |
390 | 59 | 1 | |
396 | 8 | 1 | |
396 | 55 | 1 | |
409 | 2 | 1 | |
413 | 0 | 1 | China |
415 | 1 | 1 | |
415 | 63 | 1 | |
420 | 61 | 1 | |
434 | 39 | 1 | Turkmenistan |
434 | 53 | 1 | Turkmenistan |
439 | 10 | 1 | |
440 | 37 | 1 | Korea |
444 | 5 | 1 | |
449 | 53 | 1 | |
461 | 2 | 1 | Oman |
464 | 48 | 1 | |
465 | 52 | 1 | |
466 | 20 | 1 | Qatar |
470 | 20 | 1 | United Arab Emirates |
472 | 5 | 1 | |
473 | 2 | 1 | Yemen |
473 | 3 | 1 | Yemen |
477 | 38 | 1 | Hong Kong |
479 | 47 | 1 | |
480 | 59 | 1 | |
486 | 27 | 1 | |
487 | 57 | 1 | |
491 | 11 | 1 | |
492 | 51 | 1 | |
495 | 47 | 1 | |
496 | 48 | 1 | |
503 | 35 | 1 | Australia |
504 | 12 | 1 | |
505 | 46 | 1 | |
512 | 55 | 1 | New Zealand |
515 | 28 | 1 | Cambodia |
516 | 5 | 1 | Christmas Island |
517 | 0 | 1 | |
517 | 15 | 1 | |
532 | 3 | 1 | |
534 | 50 | 1 | |
538 | 0 | 1 | Marshall Islands |
542 | 30 | 1 | Niue |
544 | 20 | 1 | Nauru |
560 | 57 | 1 | |
561 | 18 | 1 | Samoa |
564 | 52 | 1 | Singapore |
566 | 26 | 1 | |
568 | 21 | 1 | |
572 | 0 | 1 | Tuvalu |
574 | 25 | 1 | Viet Nam |
575 | 24 | 1 | |
578 | 40 | 1 | Wallis and Futuna Islands |
585 | 14 | 1 | |
586 | 20 | 1 | |
589 | 8 | 1 | |
597 | 2 | 1 | |
606 | 47 | 1 | |
607 | 40 | 1 | Saint Paul and Amsterdam Islands |
612 | 15 | 1 | Central African Republic |
612 | 58 | 1 | Central African Republic |
620 | 19 | 1 | |
626 | 22 | 1 | Gabonese Republic |
628 | 36 | 1 | |
628 | 43 | 1 | |
630 | 58 | 1 | Guinea-Bissau |
632 | 48 | 1 | Guinea |
636 | 50 | 1 | Liberia |
640 | 20 | 1 | |
640 | 41 | 1 | |
641 | 40 | 1 | |
643 | 22 | 1 | |
643 | 35 | 1 | |
647 | 38 | 1 | Madagascar |
654 | 46 | 1 | Mauritania |
656 | 20 | 1 | Niger |
672 | 40 | 1 | Tunisia |
673 | 11 | 1 | |
673 | 57 | 1 | |
677 | 39 | 1 | Tanzania |
678 | 63 | 1 | Zambia |
680 | 19 | 1 | |
698 | 31 | 1 | |
702 | 43 | 1 | |
705 | 58 | 1 | |
706 | 35 | 1 | |
709 | 53 | 1 | |
711 | 30 | 1 | |
711 | 57 | 1 | |
712 | 57 | 1 | |
714 | 3 | 1 | |
722 | 32 | 1 | |
747 | 11 | 1 | |
748 | 40 | 1 | |
749 | 38 | 1 | |
757 | 54 | 1 | |
772 | 43 | 1 | |
775 | 8 | 1 | Venezuela |
778 | 53 | 1 | |
783 | 6 | 1 | |
784 | 4 | 1 | |
787 | 33 | 1 | |
792 | 5 | 1 | |
793 | 57 | 1 | |
797 | 43 | 1 | |
799 | 23 | 1 | |
801 | 22 | 1 | Handheld VHF transceiver with DSC and GNSS |
810 | 24 | 1 | Handheld VHF transceiver with DSC and GNSS |
812 | 63 | 1 | Handheld VHF transceiver with DSC and GNSS |
817 | 58 | 1 | Handheld VHF transceiver with DSC and GNSS |
831 | 60 | 1 | Handheld VHF transceiver with DSC and GNSS |
842 | 16 | 1 | Handheld VHF transceiver with DSC and GNSS |
844 | 46 | 1 | Handheld VHF transceiver with DSC and GNSS |
845 | 18 | 1 | Handheld VHF transceiver with DSC and GNSS |
847 | 22 | 1 | Handheld VHF transceiver with DSC and GNSS |
856 | 3 | 1 | Handheld VHF transceiver with DSC and GNSS |
858 | 20 | 1 | Handheld VHF transceiver with DSC and GNSS |
867 | 3 | 1 | Handheld VHF transceiver with DSC and GNSS |
867 | 35 | 1 | Handheld VHF transceiver with DSC and GNSS |
869 | 56 | 1 | Handheld VHF transceiver with DSC and GNSS |
874 | 47 | 1 | Handheld VHF transceiver with DSC and GNSS |
875 | 11 | 1 | Handheld VHF transceiver with DSC and GNSS |
876 | 60 | 1 | Handheld VHF transceiver with DSC and GNSS |
884 | 48 | 1 | Handheld VHF transceiver with DSC and GNSS |
890 | 7 | 1 | Handheld VHF transceiver with DSC and GNSS |
891 | 14 | 1 | Handheld VHF transceiver with DSC and GNSS |
895 | 51 | 1 | Handheld VHF transceiver with DSC and GNSS |
904 | 40 | 1 | |
907 | 50 | 1 | |
908 | 34 | 1 | |
910 | 15 | 1 | |
917 | 32 | 1 | |
925 | 10 | 1 | |
926 | 60 | 1 | |
928 | 40 | 1 | |
931 | 55 | 1 | |
938 | 42 | 1 | |
940 | 43 | 1 | |
940 | 57 | 1 | |
947 | 5 | 1 | |
947 | 37 | 1 | |
950 | 63 | 1 | |
961 | 18 | 1 | |
963 | 12 | 1 | |
964 | 37 | C356 | |
967 | 11 | 1 | |
971 | 2 | 1 | |
971 | 3 | 1 | |
971 | 30 | 1 | |
972 | 28 | 1 | Man overboard DSC and/or AIS devices |
980 | 52 | 1 | craft associated with a parent ship |
981 | 18 | 1 | craft associated with a parent ship |
986 | 63 | 1 | craft associated with a parent ship |
987 | 56 | 1 | craft associated with a parent ship |
993 | 34 | 1 | AtoN |
1004 | 41 | 1 | |
1015 | 63 | 1 | |
1020 | 31 | 1 | |
1021 | 19 | 1 | |
1021 | 35 | 1 | |
1022 | 0 | 1 |