6 Information
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.74(69) - Adoption of New and Amended Performance Standards - (Adopted on 12 May 1998) - Annex 3 - Recommendation on Performance Standards for an Universal Shipborne Automatic Identification System (AIS) - 6 Information

6 Information

  6.1 The information provided by the AIS should include

  • .1 Static:

    • IMO number (where available)
    • Call sign & name
    • Length and beam
    • Type of ship
    • Location of position-fixing antenna on the ship (aft of bow and port or starboard of centerline)

  • .2 Dynamic:

    • Ship's position with accuracy indication and integrity status
    • Time in UTCfootnote
    • Course over ground
    • Speed over ground
    • Heading
    • Navigational status (e.g. NUC, at anchor, etc. - manual input)
    • Rate of turn (where available)
    • Optional - Angle of heel (where available)footnote
    • Optional - Pitch and roll (where available)footnote

  • .3 Voyage related:

    • Ship's draught
    • Hazardous cargo (type)footnote
    • Destination and ETA (at masters discretion)
    • Optional - Route plan (waypoints)footnote

  • .4 Short safety-related messages

  6.2 Information update rates for autonomous mode

The different information types are valid for a different time period and thus need a different update rate:

Static information: Every 6 min and on request
Dynamic information: Dependant on speed and course alteration according to Table 1
Voyage related information: Every 6 min, when data has been amended and on request
Safety-related message: As required
Type of ship Reporting interval
Ship at anchor 3 min
Ship 0-14 knots 12 sec
Ship 0-14 knots and changing course 4 sec
Ship 14-23 knots 6 sec
Ship 14-23 knots and changing course 2 sec
Ship > 23 knots 3 sec
Ship > 23 knots and changing course 2 sec

 Ship Reporting Capacity - the system should be able to handle a minimum of 2000 reports per min to adequately provide for all operational scenarios envisioned.

  6.3 Security

A security mechanism should be provided to detect disabling and to prevent unauthorised alteration of input or transmitted data. To protect the unauthorized dissemenation of data, the IMO guidelines (Guidelines and Criteria for Ship Reporting Systemsfootnote) should be followed.

Parent topic: Annex 3 - Recommendation on Performance Standards for an Universal Shipborne Automatic Identification System (AIS)
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