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 |