What types of information do AIS transponders transmit?

AIS transponders typically transmit the following information, depending on class.

• Vessel name, MMSI number and call sign
• Type of vessel (such as passenger, cargo, fishing)
• Vessel’s position (current latitude and longitude)
• Course over ground (COG)
• Speed over ground (SOG)
• Heading from your vessel
• Closest point of approach (CPA) (distance)
• Time to closest point of approach (TCPA)
• Vessel’s dimensions (length, beam, and draught)

17/01/2021