Question 851Navigation General

The correct answer is A) 161.975 Mhz and 162.025 Mhz. Automatic Identification System (AIS) transponders use these two specific frequency channels (161.975 MHz and 162.025 MHz) to transmit and receive information broadcasts as mandated by international maritime regulations. AIS systems allow vessels to automatically exchange identification, position, course, and speed data with other nearby ships and coastal authorities to enhance maritime safety and navigation. The other answer choices are incorrect because they do not correspond to the specific AIS frequency channels required by regulations. For example, the GPS frequencies in answer B are used for satellite navigation, not AIS transmissions.