Which statement about AIS (AIS) is true?

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Automatic Identification System delivers the who and the what of a vessel by broadcasting its identity and navigational data. Because AIS transmits information from the vessel itself over VHF, any AIS-equipped ship or shore station within range can know exactly who the vessel is and what it’s doing—even if the vessel isn’t visible on radar or in sight. This includes the vessel’s name, MMSI, type, position, course, speed, and navigational status, which is essential for safe traffic management in congested or poor-visibility conditions. The other statements don’t hold as universally true: AIS isn’t immune to radio interference, so it’s not accurate to say it’s unaffected by weather or clutter in the same way radar is; while AIS can provide reliable identity and dynamic data when its information is accurate, it isn’t inherently more precise than radar; and AIS updates, while frequent, still involve some delay, so there isn’t a guarantee of instantaneous course/speed changes with no lag.