Question 973Navigation General

70% to pass

You are approaching a sea buoy which emits a racon signal. This signal is most frequently triggered by which type of radar?

A 10 cm
B 3 cm
C Both 3 cm and 10 cm
D Signal does not depend on radar type.
AI Explanation

You are correct, the answer is B) 3 cm. Racon (radar beacon) signals are most frequently triggered by 3 cm (X-band) radar, which is the most common type of marine radar used on small and medium-sized vessels. The 3 cm radar wavelength is well-suited for detecting and triggering the racon signal, which is a radar transponder that responds to the radar signal by transmitting a coded message. The other answer choices are incorrect because 10 cm (S-band) radar is less commonly used for marine applications, and the racon signal does not depend on the specific radar wavelength but rather on the radar transponder's ability to detect and respond to the radar signal.

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Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG National Maritime Center
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