A.litmus paper
B.combustible gas indicator
C.oxygen breathing apparatus
D.oxygen indicator
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A.longitudinally
B.vertically
C.transversely
D.intermittently
A.between sunset and sunrise
B.only between 8 AM and 4 PM
C.during daylight hours in any visibility
D.during daylight hours in unrestricted visibility only
A.one zone to the east
B.one zone to the west
C.two zones to the east
D.two zones to the west
A.left in the sunlight
B.stowed wet
C.washed with soap
D.folded frequently
A.westerly
B.parallel to the isobars in the warm sector
C.toward the nearest high pressure area
D.faster than the accompanying cold front
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Coast Pilots and navigational charts are kept corrected and up-to-date by using the（）.
Define the acronym MSI（）.
Dacron sails，when not in use，may be damaged if（）.
Compared to internal structural plating，the exterior hull plating on a ship is usually（）.
Cumulus clouds that have undergone vertical development and have become cumulonimbus in form，indicate（）.
Daylight savings time is a form of zone time that adopts the time（）.
Cumulonimbus clouds are formed by（）.
Deneb is found in what constellation?（）
Chart legends printed in capital letters show that the associated landmark is（）.
Commercial ships or other persons or agencies requiring the assistance of Canadian Coast Guard icebreakers should first contact（）.