Which system provides information about another vessel's identity, dimensions and navigational status regardless of visibility?

Prepare for the ARPA and Radar Operation Test. Enhance your skills with multiple choice questions, detailed explanations, and real-time simulations. Ensure maritime safety with confidence!

Automatic Identification System provides information about another vessel’s identity, dimensions and navigational status even when you can’t see it. AIS broadcasts include the vessel’s name, MMSI, call sign, vessel type, length and beam, as well as course over ground, speed over ground, and navigational status (for example underway, at anchor, or constrained by her draft). Because these details are shared via VHF between ships and shore stations, you can learn who a target is and its size and status without relying on visual contact. Radar can show where a target is and how it’s moving, but it doesn’t reveal the vessel’s identity or exact dimensions. GPS data is about positions and timing, not the other vessel’s identity or physical dimensions, and an echo sounder measures depth, not vessel identity.