单项选择题
A.Ocean Passages for the World
B.Admiralty List of Radio Signals
C.IALA Maritime Buoyage System
D.Admiralty List of Lights and Fog Signals
单项选择题 （）gives daily predictions of the times and heights of high and low waters for over 230 standard and 6，000 secondary ports in the world.
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.
单项选择题 A rigid replica of the International Code flag “A” may be shown by a vessel （）.