Marina Board Exam: What does this signal displayed by a small craft signify when in passage up a river, she is showing a rigid replica of the international code flag "A"?

Marina Board Exam

What does this signal displayed by a small craft signify when in passage up a river, she is showing a rigid replica of the international code flag "A"? 

A. It signifies, "I am maneuvering with difficulty, keep out of my way" 
B. It signifies, "I have a diver down, I require assistance" 
C. It signifies, "I have a diver down, I am proceeding at maneuvering speed, keep clear of me" 
D. It signifies, "I have a diver down, keep well clear at slow speed" 


Answer:  D.  It signifies, "I have a diver down, keep well clear at slow speed"