Marina Exam Reviewer : Which signal is required to be sounded by a powerdriven vessel ONLY?

Marina Exam Reviewer 

Which signal is required to be sounded by a powerdriven vessel ONLY? 

A. A signal meaning, I am altering my course to starboard. 
B. A signal meaning that the vessel sounding it is in doubt as to the other vessels actions. 
C. A signal sounded when approaching a bend. 
D. A signal meaning, I intend to overtake you on your starboard side. 


Answer:      A. A signal meaning, I am altering my course to starboard. 

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