An aircraft has indicated that he wants you to change course and follow him. You cannot comply because of an emergency on board. Which signal should you make?()
A:Fire a red flare at night or a red smoke signal by day
B:Send the Morse signal "N" by flashing light
C:Make a round turn (360°) and resume course
D:Make an "S" turn (hard right then hard left) and resume course
出自:海船船员证