A.diving operations
B.dredging
C.fishing
D.mineclearance operations
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A.engaged in underwater construction
B.under sail and power
C.a pilot vessel
D.trawling
A.three black shapes in a vertical line; the highest and lowest are balls，and the middle one is a diamond
B.three shapes in a vertical line; the highest and lowest are red balls，and the middle one is a white diamond
C.three black balls in a vertical line
D.two black balls in a vertical line
A.not under command
B.engaged on pilotage duty
C.restricted in her ability to maneuver
D.engaged in fishing
A.forward masthead light
B.after masthead light
C.stern light
D.All of the above
A.two red lights at night and two black balls during daylight
B.two red lights at night and three black balls during daylight
C.three red lights at night and two black balls during daylight
D.three red lights at night and three black balls during daylight
最新試題
A vessel traveling down a narrow channel，especially if the draft is nearly equal to the depth of the water，may set off the nearer side. This effect is known as（）.
A vessel displaying three red lights in a vertical line is（）.
A vessel or object being towed astern shall display a(n)（）.
（）is due，in spite of that the salvage services have been rendered by or to vessel belonged to the same owner.
A vessel is to make a voyage between New York and San Juan，Puerto Rico，and return. The crew should be signed on（）.
A vessel may exhibit lights other than those prescribed by the Rules as long as the additional lights（）.
A vessel has a charter party for one voyage to carry a full load of manganese from Durban，South Africa，to Baltimore，Maryland，at a stipulated rate per ton. Which type of contract is involved? （）
A vessel showing a green light over a white light in a vertical line above the level of the sidelights is（）.
A vessel is considered to be “restricted in her ability to maneuver” under the Rules if she is （）.
A vessel may use any sound or light signals to attract the attention of another vessel as long as（）.