Standard Class B equipment position report
See Also:
| Name | NumberOfBits | ArrayLength | Type | Units | Description |
|---|---|---|---|---|---|
| MessageID | 6 | uint | AIS message number. Must be 18 | ||
| RepeatIndicator | 2 | uint | Indicated how many times a message has been repeated 0: default 3: do not repeat any more |
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| UserID | 30 | uint | Unique ship identification number (MMSI) | ||
| Reserved1 | 8 | uint | Reseverd for definition by a compentent regional or local authority. Should be set to zero. | ||
| SOG | 10 | udecimal | knots | Speed over ground 102.2: 102.2 knots or higher |
|
| PositionAccuracy | 1 | uint | Accuracy of positioning fixes 0: low (greater than 10 m) 1: high (less than 10 m) |
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| longitude | 28 | decimal | degrees | Location of the vessel East West location | |
| latitude | 27 | decimal | degrees | Location of the vessel North South location | |
| COG | 12 | udecimal | degrees | Course over ground | |
| TrueHeading | 9 | uint | degrees | True heading (relative to true North) | |
| TimeStamp | 6 | uint | seconds | UTC second when the report was generated 60: not available/default 61: manual input 62: dead reckoning 63: inoperative |
|
| Spare | 2 | uint | Not used. Should be set to zero. | ||
| cs_unit | 1 | bool | Does this unit do Carrier Sense? False: Class B SOTDMA unit True: Class B CS unit |
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| display_flag | 1 | bool | Does this class B unit have an integrated display? False: No display True: Integrated Display |
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| dsc_flag | 1 | bool | Does it have dedicated or time-shared DSC radio function? False: No DSC function True: Has DSC |
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| band_flag | 1 | bool | How flexible is the freq handling of the unit? False: Upper 525 kHz band True: Whole marine band |
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| msg22_flag | 1 | bool | Can the unit handle msg 22? False: No freq management True: Freq management with msg 22 |
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| mode_flag | 1 | bool | Assigned mode wrt to VDL slots False: Autonomous and continuous mode True: Assigned mode |
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| RAIM | 1 | bool | Receiver autonomous integrity monitoring flag False: not in use True: in use |
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| CommStateSelector | 1 | uint | SOTDMA or ITDMA 0: SOTDMA 1: ITDMA |
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| CommState | 19 | uint | Not decoded by this software yet |