A.thank
B.be thankful
C.be thanked
D.be thankful for
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A.frequent opening of hatches to permit entry of fresh air
B.regular checks of bilge levels
C.use of ear plugs to dampen engine noise
D.frequent flushing of the water spray system with fresh water
A.has little use for ocean-going mariners
B.permits the mariner to select and simultaneously calculate tidal heights for multiple ports for up to seven days
C.includes periods of daylight and nautical twilight，moon phases and a springs and neaps indicator
D.is supplied in the form of a single CD which contains the calculation program and the seven geographic Area Data Sets（ADS）providing global coverage
A.start the engine in cold weather
B.aid in helping personnel breathe
C.prime the sprinkler system
D.prime the air supply
A.Distress position
B.Spoken words“Mayday，Mayday，Mayday”
C.Ship's name
D.Ship's call letters
A.generally shorter than the others and is used to steer with
B.is longer than the others and is used as the stroke oar
C.is raised in the bow of the boat for the steersman to steer by
D.longer than the others used for steering
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After being launched from a vessel，totally enclosed survival craft which have been afloat over a long period require（）.
Light Lists for coastal waters are（）.
The Lists of Meteorological Observation Stations can be found in（）.
Mariners not entering the port are（）to keep at least one mile off.
An inflatable liferaft is hand-launched by（）.
The program of graphical predictions of height against time for a period of up to seven consecutive days is contained in（）.
The international number，location and/or name，geographical co-ordinates，characteristics and intensity，elevation in metres，range in sea miles and description of structure of a light can be found in（）.
The latest known details of lights are given in（）.
Lines drawn through points on the Earth having the same atmospheric pressure are known as （）.
For details of these and other lights the larger scale charts and Admiralty Lists should be （）.