The Mariner’s Handbook （）general information affecting navigation and is complementary to the Sailing Directions．

单项选择题A rigid replica of the International Code flag “A” may be shown by a vessel （）.

A.pulling a submarine cable
B.engaged in diving operations
C.engaged in underway replenishment
D.transferring explosives

单项选择题A flooded lifeboat on board a vessel would adversely affect the vessel’s stability by（）.

A.increasing the righting moment
B.decreasing the vessel's displacement
C.increasing the reserve buoyancy
D.shifting the CG（center of gravity）off center

单项选择题An orange flag showing a black circle and square is a（）.

A.Signal indicating a course change
B.Distress signal
C.Signal of asking to communicate with another vessel
D.Signal indicating danger

单项选择题Of the following，（）is not likely found in The Mariners Handbook.

A.navigational hazards and buoyage，meteorological data，details of pilotage，regulations，port facilities and guides to major port entry
B.information on charts
C.information on operational information and regulation
D.information on tides，currents and characteristics of the sea

单项选择题（）gives a description of the combined Cardinal and Lateral Buoyage system including textual and diagrammatic explanations of the five types of marks;lateral;cardinal,isolated danger;safe water and special marks.

A.Ocean Passages for the World
B.Symbols and Abbreviations used on Admiralty Charts，Chart 5011
C.IALA Maritime Buoyage System
D.The Mariners Handbook