A.matching pulse rates of at least 20 stations
B.an automatic on-and-off switch
C.a horizontal matching of all delayed hyperbolic signals
D.automatic signal acquisition and cycle matching
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A tonnage tax is levied according to the（）.
A casualty report of an intentional grounding of a ship is required under what condition?（）
A VLCC (100，000 DWT+) with a 30，000 Shaft Horsepower Steam Turbine is slow to respond to engine movements and has less stopping power than normal ships because it has a（）.
A continuous watertight bulkhead on a ship is normally also a(n)（）.
A “reaching” course is one in which the wind（）.
A “sheepshank” is used to（）.
A conscious victim who has suffered a blow to the head has symptoms that indicate the possibility of concussion. If the patient feels no indication of neck or spine injury，recommended treatment would include（）.
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A vessel’s quarter is that section which is（）.