{
  "url": "https://openlegislation.uk/eu-regulation-2019-838/annex/division-3/division-3.4/division-3.4.1",
  "json_url": "https://openlegislation.uk/eu-regulation-2019-838/annex/division-3/division-3.4/division-3.4.1.json",
  "legislation": "eur/2019/838",
  "legislation_title": "Commission Implementing Regulation (EU) 2019/838 of 20 February 2019 on technical specifications for vessel tracking and tracing systems and repealing Regulation (EC) No 415/2007",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2019-838",
  "path": "annex/division/3/division/3.4/division/3.4.1",
  "kind": "division",
  "number": "3.4.1",
  "heading": "Table 3.2 Position report",
  "text": "Table 3.2\nPosition report\nNot applicable within the Union for the purpose of this Regulation\nKnots shall be calculated in km/h by external on-board equipment.\nShall only be evaluated if the report is coming from an Inland AIS mobile station and if the information is derived by automatic means (direct connection to switch).\nParameter\nNumber of bits\nDescription\nMessage ID\n6\nIdentifier for this message 1, 2 or 3\nRepeat indicator\n2\nUsed by the repeater to indicate how many times a message has been repeated\n0-3; Default = 0; 3 = do not repeat any more\nUser ID (MMSI)\n30\nMMSI number\nNavigational Status\n4\n0 = under way using engine; 1 = at anchor; 2 = not under command; 3 = restricted manoeuvrability; 4 = constrained by her draught; 5 = moored; 6 = aground;\n7 = engaged in fishing; 8 = under way sailing;\n9 = reserved for future amendment of Navigational Status for a high-speed craft;\n10 = reserved for future amendment of Navigational Status for Wing In Ground (WIG);\n11 = power-driven vessel towing astern (regional use)\n12 = power-driven vessel pushing ahead or towing alongside (regional use);\n13 = reserved for future use; 14 = AIS-SART (active);\n15 = not defined = default (also used by AIS)\nRate of turn ROT AIS\n8\n0 to + 126 = turning right at up to 708° per min or higher\n0 to – 126 = turning left at up to 708° per min or higher\nValues between 0 and 708° per min coded by ROTAIS = 4.733 SQRT(ROTsensor) degrees per min where ROTsensor is the Rate of Turn as input by an external Rate of Turn Indicator. ROTAIS is rounded to the nearest integer value\n+ 127 = turning right at more than 5° per 30 s (No Turn Indicator available)\n– 127 = turning left at more than 5° per 30 s (No Turn Indicator available)\n– 128 (80 hexadecimal) indicates no turn information available (default).\nROT data should not be derived from COG information\nSpeed over ground\n10\nSpeed over ground in 1/10 knot steps (0-102,2 knots)\n1 023 = not available; 1 022 = 102,2 knots or higher\nPosition accuracy\n1\nThe position accuracy (PA) flag should be determined in accordance with ITU-R M. 1371\n1 = high (=< 10 m)\n0 = low (> 10 m)\n0 = default\nLongitude\n28\nLongitude in 1/10 000 min (± 180o, East = positive (as per 2's complement), West = negative (as per 2's complement),\n181= (6791AC0 hexadecimal) = not available = default)\nLatitude\n27\nLatitude in 1/10 000 min (± 90o, North = positive (as per 2's complement), South = negative (as per 2's complement), 91= (3412140 hexadecimal) = not available = default)\nCourse over ground\n12\nCourse over ground in 1/10o (0-3599). 3 600 (E10 hexadecimal)\n= not available = default;\n3 601 — 4 095 shall not be used\nTrue heading\n9\nDegrees (0-359) (511 indicates not available = default).\nTime stamp\n6\nUTC second when the report was generated by the electronic positioning fixing system (EPFS) (0-59, or 60 if time stamp is not available, which shall also be the default value, or 61 if positioning system is in manual input mode, or 62 if Electronic Position Fixing System operates in estimated (dead reckoning) mode, or 63 if the positioning system is inoperative)\nSpecial manoeuvre indicator: blue sign\n2\nIndication if blue sign is set\n0 = not available = default,\n1 = not engaged in special manoeuvre = blue sign not set\n2 = engaged in special manoeuvre = blue sign is set\nyes,\n3 is not used\nSpare\n3\nNot used. Should be set to zero. Reserved for future use.\nRAIM-flag\n1\nReceiver autonomous integrity monitoring (RAIM) flag of electronic position fixing device; 0 = RAIM not in use = default; 1 = RAIM in use. RAIM-flag should be determined in accordance with ITU-R M. 1371\nCommunication state\n19\nCommunication state should be determined in accordance with ITU-R M. 1371\nTotal\n168\nOccupies one slot",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "Not applicable within the Union for the purpose of this Regulation"
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "Knots shall be calculated in km/h by external on-board equipment."
    },
    {
      "type": "footnote",
      "label": "f3",
      "text": "Shall only be evaluated if the report is coming from an Inland AIS mobile station and if the information is derived by automatic means (direct connection to switch)."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2019/838/annex/division/3/division/3.4/division/3.4.1",
    "retrieved_at": "2026-11-01T14:43:22.038059+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}