单项选择题

A head on situation shall be deemed to exist at night when a power-driven vessel sees another power-driven vessel ahead and （）.

A.one sidelight and the masthead light are visible
B.the vessels will pass closer than half a mile
C.both vessels sound one prolonged blast
D.both sidelights and masthead light(s) are visible

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单项选择题

The Sailing Directions contain information on （）.

A.required navigation lights
B.lifesaving equipment standards
C.casualty reporting procedures
D.currents in various locations

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You will find information about the duration of slack water in the （）.

A.Tidal Current Tables
B.Tide Tables
C.American Practical Navigator
D.Sailing Directions

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（）amplify charted detail and contain information needed for safe navigation.

A.Admiralty Sailing Directions
B.Admiralty List of Lights
C.Admiralty List of Signals
D.Admiralty Notices to Mariners