What is the use of the books of Admiralty List of Lights and Fog Signals? Their use is to （）.

Mariners not entering the port are（）to keep at least one mile off.

Important changes to charts and lights（including temporary ones），radio signals and sailing directions are listed in（）.

The program of graphical predictions of height against time for a period of up to seven consecutive days is contained in（）.

A man aboard a vessel，signaling by raising and lowering his outstretched arms to each side，is indicating（）.

An orange flag showing a black circle and square is a（）.

An inflatable liferaft should be manually released from its cradle by（）.

On an Atlantic Ocean voyage from New York to Durban，South Africa，you should expect the Agulhas Current to present a strong（）.

After jacking down your liftboat you have an unexpected list.You find that the only cause of this list must be a flooded leg.Your next course of action should be to（）.

A person who sees someone fall overboard should（）.