航海英语号灯与号型章节练习(2018.03.23)

单项选择题
A 95-meter vessel aground sounds which fog signal? （）
A.A rapid ringing of a bell for 5 seconds every two minutes
B.A whistle signal of one short，one prolonged，and one short blast
C.A prolonged blast of the whistle at intervals not to exceed one minute
D.A rapid ringing of a bell for 5 seconds，preceded and followed by three separate and distinct strokes on the bell
单项选择题
The prohibition against displaying lights which may be confused with required navigation lights applies（）.
A.from sunset to sunrise and during restricted visibility
B.only when other vessels are in the area
C.only when operating in a traffic separation scheme
D.only when under tow
单项选择题
A power-driven vessel shall have her engine ready for（）when the visibility is restricted.
A.immediately stop
B.immediately maneuvering
C.immediately anchoring
D.immediately going astern
单项选择题
The International Regulations for Preventing Collisions at Sea contain the requirements for （）.
A.lights that must be displayed on anchor buoys
B.the display of load line markings
C.minimum horsepower for tugs involved in rig moves
D.lighting of mobile offshore drilling units being towed
单项选择题
Some lights used as aids to marine navigation have a red sector to indicate a danger area. The limits of a colored sector of a light are listed in the Light List in which of the following manners?（）
A.Geographical positions outlining the area of the sector
B.True bearings as observed from the ship toward the light
C.An outline of the area of the sector
D.True bearings as observed from the light toward the ship
单项选择题
A vessel is fishing at anchor on the high seas. Which of the following day signals should she display if she has gear extending out over 150 meters horizontally from the vessel?（）.
A.A black ball in the forepart of her vessel
B.A black double frustum of a cone
C.A basket where best seen
D.A black cone point upwards
单项选择题
A vessel will NOT show sidelights when（）.
A.underway but not making way
B.making way，not under command
C.not under command，not making way
D.trolling underway
单项选择题
A power-driven vessel，when towing astern，shall show（）.
A.two towing lights in a vertical line
B.a towing light in a vertical line above the sternlight
C.two towing lights in addition to the sternlight
D.a small white light in lieu of the sternlight
单项选择题
By night，you sight the lights of a vessel engaged in underwater operations. If an obstruction exists on the port side of the vessel，it will be marked by（）.
A.a floodlight
B.two red lights in a vertical line
C.a single red light
D.any visible lights
单项选择题
A vessel towing where the tow prevents her from changing course shall carry（）.
A.only the lights for a vessel towing
B.only the lights for a vessel restricted in her ability to maneuver
C.the lights for a towing vessel and the lights for a vessel restricted in her ability to maneuver
D.the lights for a towing vessel and the lights for a vessel not under command