Question 32 Deck Safety

The correct answer is D) The rescue personnel were monitoring the 10-cm radar. SART (Search and Rescue Transponder) devices are designed to operate on the 9-GHz frequency, which corresponds to a wavelength of about 3 cm. Rescue personnel monitoring a 10-cm radar would not be able to detect the SART signal, as the longer 10-cm wavelength is not well-suited for picking up the SART's 3-cm signal. In contrast, the 3-cm radar would be able to detect the SART's signal, making option C the correct choice. The other options are incorrect because signal absorption by the ionosphere (A) would not specifically prevent SART detection, and heavy sea swells (B) would not interfere with the SART's ability to transmit its signal.