Marina Exam for OIC: When two vessels are in sight of one another and NOT in or near an area of restricted visibility, any of the following signals may be given EXCEPT __________.

Marina Exam for OIC

When two vessels are in sight of one another and NOT in or near an area of restricted visibility, any of the following signals may be given EXCEPT __________. 

A. two short whistle blasts 
B. one prolonged, one short, one prolonged, and one short whistle blasts 
C. four short whistle blasts 
D. a light signal of at least five short and rapid flashes 

Answer:  C. four short whistle blasts