______should be used during the poor visibility if the rader’s screen shows heavy sea returns.
A.Gain Control
B.Brilliant Control
C.Anti-clutter Sea Control
D.Sweep Intercept
第1题：
A sea anchor is ______.
A.a heavy anchor with an extra long line used to anchor in deep water
B.a cone shaped bag used to slow down the wind drift effect
C.a pad eye to which the sea painter is made fast
D.made of wood if it is of an approved type
第2题：
The sprinkler system of an enclosed lifeboat is used to ______.
A.cool the craft in a fire
B.cool the engine
C.spray oil on the sea to calm it
D.spray personnel during a fire
第3题：
A marker pole，with a horseshoe buoy and a sea anchor attached，should be used to ______.
A.mark the position of a lost mooring
B.determine your vessel's sideslip underway
C.determine your speed through the water
D.indicate location of a man overboard
第4题：
______will reduce the visibility．
A.dust
B.sea water
C.land sand
D.Wind
第5题：
Coast Guard approved buoyant work vests ______．
A.may be substituted for 10 percent of the required life preservers
B.should be stowed adjacent to lifeboats and emergency stations
C.may be used by boat crews and line handlers during lifeboat drills
D.should be used when carrying out duties near a weather deck's edge
第6题：
All of the following can be found on a Pilot Chart EXCEPT information concerning the ______.
A.percentage of frequency of wave heights
B.percentage of poor visibility conditions
C.sea surface temperatures
D.amounts of precipitation
第7题：
VESSEL’S EXPERIENCE FACTOR is likely used in ______ cargo survey report．
A.general
B.liquid
C.container
D.heavy
第8题：
A heavy steel device that is set on the sea floor and used as a drilling template in offshore drilling operations is called a ______.
A.temporary guide base
B.permanent guide base
C.guide frame
D.foundation template
第9题：
What should be used to steer an open lifeboat if the rudder becomes lost or damaged ________．
A.Sea anchor
B.Steering oar
C.Spare rudder
D.Daggerboard
第10题：
It is required that______should be used during the poor visibility if the radar’s screen shows heavy sea returns．
A.Gain Control
B.Brilliant Control
C.Anti-clutter Sea Control
D.Sweep Intercept