Marina Exam for OIC: A vessel may use any sound or light signals to attract the attention of another vessel as long as __________.

Marina Exam for OIC 

A vessel may use any sound or light signals to attract the attention of another vessel as long as __________. 

A. the signal cannot be mistaken for a signal authorized by the Rules 
B. red and green lights are not used 
C. the vessel signals such intentions over the radiotelephone 
D. it is one of those listed under Annex IV of the Collision Regulations 


Answer:  A. the signal cannot be mistaken for a signal authorized by the Rules