Which class of AIS transceivers is required on SOLAS vessels?

• A. Class B
• B. Class A
• C. Class C
• D. Class D

Answer: (B)

On SOLAS vessels, Class A AIS transceivers are required. This higher-performance type is mandated because it continuously broadcasts more detailed vessel data at higher update rates, including identity, position, course, speed, navigational status, and other dynamic information. This enhanced reporting improves situational awareness and collision avoidance for ships on international routes and for shore authorities. Class B transceivers exist for other vessels and have lower reporting rates and fewer data fields, so they don’t meet SOLAS requirements.