A.towing vessel is less than 50 meters
B.towing vessel is greater than 50 meters
C.tow is less than 200 meters
D.tow is greater than 200 meters
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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
A.two balls in a vertical line
B.a diamond shape where it can best be seen
C.a ball on each end of the tow
D.no dayshape
A.no fog signal
B.one short blast
C.one prolonged and three short blasts
D.one prolonged，one short，and one prolonged blast
A.red
B.red and white
C.green
D.green and white
A.One
B.Two
C.Three
D.Four
最新試題
On entering from seaward，a starboard side daymark will（）.
A red triangular daymark marks（）.
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 single towing light will be carried above a vessel’s sternlight（）.
An all-round flashing yellow light may be exhibited by a(n)（）.
A power-driven vessel，when towing astern，shall show（）.
Entering from seaward，triangular-shaped daymarks are used to mark（）.
Daymarks marking the starboard side of the channel when going towards the sea are（）.
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.
A vessel being towed astern，where the length of the tow exceeds 200 meters，will exhibit （）.