AIS 650 status

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Neal,

Unlike Class A AIS transceivers, status is not transmitted by Class B AIS transceivers. Accordingly, there is no provision within the MFDs or within the ProAIS2 software to configure vessel status.

The following excerpt from Wiki regarding Class B AIS messages may provide you with additional information on this subject:

Four messages are defined for class B units:

Message 14
Safety Related Message: This message is transmitted on request for the user – some transceivers have a button that enables it to be sent, or it can be sent through the software interface. It sends a pre-defined safety message.

Message 18
Standard Class B CS Position Report: This message is sent every 3 minutes where speed over ground (SOG) is less than 2 knots, or every 30 seconds for greater speeds. MMSI, time, SOG, COG, longitude, latitude, true heading

Message 19
Extended Class B Equipment Position Report: This message was designed for the SOTDMA protocol, and is too long to be transmitted as CSTDMA. However a coast station can poll the transceiver for this message to be sent. MMSI, time, SOG, COG, longitude, latitude, true heading, ship type, dimensions.

Message 24
Class B CS Static Data Report: This message is sent every 6 minutes, the same time interval as for Class A transponders. Because of its length, this message is divided into two parts, sent within one minute of each other. This message was defined after the original AIS specifications, so some Class A units may need a firmware upgrade to be able to decode this message. MMSI, boat name, ship type, call sign, dimensions, and equipment vendor id.