A.red-and-white octagon
B.daymark with a yellow stripe on it
C.green square
D.yellow diamond
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A.cross connection line between two main fire lines
B.special wrench for the couplings in a fire hose line
C.tackle rigged to support a fire hose
D.None of the above
A.gale force winds within 12 hours
B.blizzard conditions
C.deteriorating or unsettled weather
D.heavy，wind driven rain
A.rainy weather for the next 48 hours
B.high seas
C.improving weather conditions
D.deteriorating weather conditions
A.seawater temperature
B.engine temperature
C.dry bulb and wet bulb temperatures
D.barometric pressure
A.Shift weight to the bow
B.Shift weight to the center of the boat
C.Shift weight to the stern
D.Throw excess weight overboard
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A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.
A tow of 9 barges is made up three abreast by three long. The towboat is faced up to the last barge of the center string. The outer two strings of barges are the（）.
A tug is “in irons” when held in a fixed position by（）
A thrust block is designed to（）.
A tank 36 ft. by 36 ft. by 6 ft. is filled with water to a depth of 5 ft. If a bulkhead is placed in the center of the tank running fore-and-aft along the 36-foot axis，how will the value of the moment of inertia of the free surface be affected?（）
A stand-on vessel is（）.
A time diagram is a diagram on the plane of the（）.
A slow，gradual fall of the barometer indicates approaching（）.
A sufficient amount of chain must be veered when anchoring a vessel to ensure（）.
A towing hook may be released from the（）.