單項(xiàng)選擇題Mean high water is the average height of().

A.The higher high waters
B.The lower high waters
C.The lower of the two daily tides
D.All high waters


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1.單項(xiàng)選擇題Mariners not entering the port are()to keep at least one mile off.

A.Advised
B.Reported
C.Complied
D.Supplied

3.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

4.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

5.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