Question 845Navigation General

The correct answer is A) 2. An automatic identification system (AIS) operates on two radio channels, as specified by the International Telecommunication Union (ITU) for maritime use. The two AIS channels are 161.975 MHz (AIS 1) and 162.025 MHz (AIS 2). These dedicated frequencies allow AIS-equipped vessels to continuously transmit and receive information about their identity, position, course, and speed, which is critical for maritime safety and navigation. The other answer choices are incorrect because AIS systems do not operate on 4, 6, or 8 radio channels. The use of only two channels is the standard requirement for AIS systems to function effectively and ensure reliable communication between vessels and shore-based stations.