單項(xiàng)選擇題Many of the lights on this coast are placed so high as to be frequently obscured by().

A.Power
B.Tower
C.Cover
D.Shower


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1.單項(xiàng)選擇題Lines drawn through points on the Earth having the same atmospheric pressure are known as ().

A.Isothermal
B.Millibars
C.Isobars
D.Seismics

2.單項(xiàng)選擇題Light Lists for coastal waters are().

A.published every year and require no corrections
B.published every second year and must be corrected
C.published every five years and require no correction
D.accurate thru NM number on title page and must be corrected

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

A.Weekly Admiralty Notices to Mariners
B.The Mariners Handbook
C.Ocean Passages for the World
D.Symbols and Abbreviations used on Admiralty Charts,Chart 5011

4.單項(xiàng)選擇題For details of these and other lights the larger scale charts and Admiralty Lists should be ().

A.considered
B.consulted
C.concluded
D.commanded

5.單項(xiàng)選擇題Before personnel are lifted from a vessel in a personnel basket,the vessel should be().

A.Directly under the boom
B.Moving away from the boom
C.Stopped dead in the water
D.Tied to the boom