AIVDMAIVDO protocol decoding. The following table describes message types that are international. ITU1. 37. 1 and its revisions. There are also local. Danube. and the Thames and in British and Irish coastal waters pointers. Note that many sources use 1 origin numbering for the bits. Well. use 0 origin in this document. The first 6 bits of the payload 0 5 are the message type. Message. types are as follows Table 4. Message types. 01. Position Report Class A0. Position Report Class A Assigned schedule0. Position Report Class A Response to interrogation0. Base Station Report. Static and Voyage Related Data. Binary Addressed Message. Siemens Vdo Key Windows 7' title='Siemens Vdo Key Windows 7' />Binary Acknowledge. Binary Broadcast Message. Standard SAR Aircraft Position Report. UTC and Date Inquiry. UTC and Date Response. Addressed Safety Related Message. Safety Related Acknowledgement. Siemens Vdo Key Windows 7' title='Siemens Vdo Key Windows 7' />Find or Sell any Parts for Your Vehicle in USA. Parts for Sale Add New Used Part Blog Contact Us Add New Used Part. A full list of all items that were repaird in the past, and are repaired in Aganim Maintenance. Engine lift and alignment equipment Carrying capacity 900 kg Angle of inclination45 Weight 1,7 kg Drive 12 Load adjustable engine lifting equipment. Safety Related Broadcast Message. Interrogation. 16. Assignment Mode Command. DGNSS Binary Broadcast Message. Standard Class B CS Position Report. Extended Class B Equipment Position Report. Data Link Management. Aid to Navigation Report. Channel Management. Infineon Technologies AG is a German semiconductor manufacturer founded on 1 April 1999, when the semiconductor operations of the parent company Siemens AG were spun. Group Assignment Command. Static Data Report. Single Slot Binary Message,2. Multiple Slot Binary Message With Communications State. Position Report For Long Range Applications. In normal operation, an AIS transceiver will broadcast a position report. It will send a type 5 identification every 6. More detail is at IALA, part 2. Class 6 is used for unencrypted structured extension messages systems. Inland AIS standard defined by INLAND, and by local. St. Lawrence Seaway and the U. S Coast Guards. PAWSS. This document describes all of the Class 6 special message. IMO2. 36, IMO2. INLAND. Class 8 is in common use for private encrypted messages, such as. It is also used for. Inland AIS, and by local. St. Lawrence Seaway and PAWSS. This document. describes all of the Class 8 special message formats approved for use. IMO2. 36, IMO2. INLAND. Classes 1. In practice, message types other than 1, 3, 4, 5, 1. AIS transmitters never emit them. An MMSI is a Mobile Marine Service Identifier, a unique 9 digit ID for. The first three digits convey information about. ID was issued ITU MID. US vessels. travelling solely in U. S. waters sometimes incorrectly omit the. North and Central America and. Caribbean, emitting 8 digit MMSIs beginning with the U. S. country code. of 6. According to MMSI, different formats of MMSI are used for. In the format descriptions below, a. MID is a three digit decimal literal ranging from 2. See ITU MID. for a list of MIDs. Table 5. MID formats. MIDXXXXX Divers radio not used in the U. S. in 2. 01. 3MIDXXXXXXShip. MIDXXXXXGroup of ships the U. S. Coast Guard, for example, is 0. MIDXXXXCoastal stations. MIDXXXSAR Search and Rescue aircraft. MIDXXXXAids to Navigation. MIDXXXXAuxiliary craft associated with a parent ship. MIDXXXAIS SART Search and Rescue Transmitter9. XXXXXXMOB Man Overboard device. XXXXXXEPIRB Emergency Position Indicating Radio Beacon AISDetailed descriptions of message types 1 2. Message types 1 2. IALA. Message type 2. Mike. Greene based on IEC 6. Message type 2. 4 was described to me by. Schwehr, whose Python toolkit decodes it. Message types 2. 5 2. Schwehr, who observes they were added in Version 3 of. ITU1. 37. 1. Message type 2. ITU1. 37. 1 version 4. The Member column in these tables is not derived from any of the ITU. I have invented it in order to be able to. AIS sentences in JSON. These. names are also chosen for suitability as structureobject member names. The T column declares the data type of the field, and may have. It is intended to be used. Unsigned integer. UUnsigned integer with scale renders as float, suffix is decimal placesi. Signed integer. ISigned integer with scale renders as float, suffix is decimal placesb. Booleane. Enumerated type controlled vocabularyx. Spare or reserved bitt. String packed six bit ASCIId. Data uninterpreted binarya. Array boundary, numeric suffix is maximum array size. Following fields are repeated to end of message. Signatures Do Not Match The Previously Installed Version Ignoring here. The field breakdowns in this document have been checked against live. Described but unchecked are 1. Also, the interpretation of IMO extension subtypes of messages. Bit lengths and length ranges are given because decoders should check. Messages with correct checksums but the. AISHub if you dont reject these, your clients will see spurious. Types 1, 2 and 3 Position Report Class AType 1, 2 and 3 messages share a common reporting structure for. Common Navigation Block. CNB. This is the information most likely to be of interest for. Total of 1. 68 bits, occupying one AIVDM sentence. Table 6. Common Navigation Block. Field Len Description Member TUnits. Message Typetypeu. Constant 1 3. 6 7. Repeat Indicatorrepeatu. Message repeat count. MMSImmsiu. 9 decimal digits. Navigation Statusstatuse. See Navigation Status4. Rate of Turn ROTturn. I3. See below. 50 5. Speed Over Ground SOGspeed. U1. See below. 60 6. Position Accuracyaccuracyb. See below. 61 8. Longitudelon. I4. Minutes1. 00. Latitudelat. I4. Minutes1. Course Over Ground COGcourse. U1. Relative to true north. True Heading HDGheadingu. Time Stampsecondu. Second of UTC timestamp. Maneuver Indicatormaneuvere. See Maneuver Indicator1. Sparex. Not used. RAIM flagraimb. See below. Radio statusradiou. See below. The Repeat Indicator is a directive to an AIS transceiver that this. This was intended as a way of getting. AIS messages around hills and other obstructions in coastal waters. It is. intended that the bit be incremented on each retransmission, to a. A value of 3 indicates Do not repeat. Table 7. Navigation Status. Under way using engine. At anchor. 2Not under command. Restricted manoeuverability. Constrained by her draught. Moored. 6Aground. Engaged in Fishing. Under way sailing. Reserved for future amendment of Navigational Status for HSC1. Reserved for future amendment of Navigational Status for WIG1. Reserved for future use. Reserved for future use. Reserved for future use. AIS SART is active. Not defined defaultNote, the AIS SART value was added after IALA and designates an. AIS transmitter in an survival craft such as a lifeboat. See. AIS SART for the field specification and SART for. Turn rate is encoded as follows. No TI available. No TI available. Values between 0 and 7. ROTAIS4. 7. 33. SQRTROTsensor degreesmin where ROTsensor is the Rate of Turn as. Rate of Turn Indicator. ROTAIS is rounded to. Thus, to decode the field value, divide by 4. Sign of the field value should be preserved when. Speed over ground is in 0. Value 1. 02. 3 indicates speed is not available, value 1. The position accuracy flag indicates the accuracy of the fix. A value of. 1 indicates a DGPS quality fix with an accuracy of lt 1. GNSS fix with accuracy 1. Longitude is given in in 11. Values up to plus or minus 1. East positive, West. A value of 1. 81 degrees 0x. AC0 hex indicates that. Latitude is given in in 11. Values up to plus or minus 9. North positive. South negative. A value of 9. 1 degrees 0x. Course over ground will be 3. E1. 0 if that data is not available. Seconds in UTC timestamp should be 0 5. Electronic Position Fixing System operates in estimated dead. The Regional Reserved field is intended for use by local maritime. It is not known to be in any actual use up to 2. The Maneuver Indicator 1. Table 8. Maneuver Indicator. Not available default1. No special maneuver. Special maneuver such as regional passing arrangementRiverine and inland navigation systems conforming to INLAND.