Question 384 Deck Safety

The correct answer is C) vertical motion of a white flag or the arms. This is the correct answer because the International Code of Signals states that the vertical motion of a white flag or the arms is the signal meaning "This is the best place to land" by day. This visual signal is used to indicate the optimal landing spot to other vessels or aircraft in the area. The other answer choices are incorrect because they do not match the established meaning of this day signal. White smoke, white star rockets, and the vertical motion of a red flag do not have the specific meaning of indicating the best landing location.