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單項選擇題

Many navigational warnings are of a temporary nature，but others remain in force for several months or may be succeeded by（）.

A.Notices to Mariners
B.Sailing Directions
C.List of Lights and Signals
D.Guide to Port Entries

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單項選擇題

LOW AT 34N 135E ESLY SLWLY INTST NC．This description is most likely to be under the heading of（）.

A.GL WNG
B.GEN SYN
C.STM WNG
D.TY WNG

單項選擇題

LOW ABOUT 300 MILES SOUTHWEST OF LISBON 1004 MOVING SLWLY SOUTHEAST COMMA FILLING 1006 BY MIDNIGHT.This phrase is likely to be under the heading of（）.

A.GALE WARNING
B.24 HOURS FORECAST
C.GENERAL SITUATION
D.TROPICAL CYCLONE WARNING