Which feature is unique to Class A AIS units compared to Class B units?

Which feature is unique to Class A AIS units compared to Class B units?

• A. Higher transmission frequency
• B. Capability to track more vessels
• C. Automatic retransmission of distress messages
• D. Ability to operate without a power source

Answer: (C)

The distinctive feature of Class A AIS (Automatic Identification System) units is their capability to automatically retransmit distress messages. This functionality is crucial for maritime safety, particularly in emergency situations. Class A units are designed for vessels that are required to carry AIS under international regulations, such as passenger vessels and cargo ships over a certain size. When a Class A unit detects a distress signal, it can automatically transmit this information to other nearby vessels and shore stations, facilitating rapid response efforts in emergencies. In contrast, Class B AIS units, which are typically used on smaller vessels, do not include this automatic distress retransmission feature. They have a lower priority and less stringent requirements, which limits their capabilities compared to Class A units. This distinction emphasizes the importance of Class A units in providing enhanced safety and operational efficiency within maritime environments.

The distinctive feature of Class A AIS (Automatic Identification System) units is their capability to automatically retransmit distress messages. This functionality is crucial for maritime safety, particularly in emergency situations. Class A units are designed for vessels that are required to carry AIS under international regulations, such as passenger vessels and cargo ships over a certain size. When a Class A unit detects a distress signal, it can automatically transmit this information to other nearby vessels and shore stations, facilitating rapid response efforts in emergencies.

In contrast, Class B AIS units, which are typically used on smaller vessels, do not include this automatic distress retransmission feature. They have a lower priority and less stringent requirements, which limits their capabilities compared to Class A units. This distinction emphasizes the importance of Class A units in providing enhanced safety and operational efficiency within maritime environments.