Marina Board Exam: What is the minimum sound signaling equipment required aboard a vessel 10-meters in length?

Marina Board Exam    

What is the minimum sound signaling equipment required aboard a vessel 10-meters in length? 

A. A whistle only 
B. A bell only 
C. A bell and a whistle 
D. Any means of making an efficient sound signal 


Answer:  D.  Any means of making an efficient sound signal