A.no fog signal
B.one short blast
C.one prolonged and three short blasts
D.one prolonged，one short，and one prolonged blast
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A.red
B.red and white
C.green
D.green and white
A.One
B.Two
C.Three
D.Four
A.white light
B.red light
C.yellow light
D.blue light
A.special flashing light
B.anchor light
C.sternlight
D.masthead light
A.only if she is towing astern
B.only if the tow exceeds 200 meters
C.at any time when towing
D.if the towing vessel is part of a composite unit
最新試題
A towing light，according to the Rules，is a（）.
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.
According to the Rules，when should lights be displayed?（）.
As defined in the Rules，a towing light is a yellow light having the same characteristics as a(n)（）.
Environmental loading consists of the forces caused by wind，waves，and（）.
An all-round flashing yellow light may be exhibited by a(n)（）.
The duration of a prolonged blast of the whistle is（）.
A red triangular daymark marks（）.
The prohibition against displaying lights which may be confused with required navigation lights applies（）.
A towing vessel 30 meters in length is pushing barges ahead. How many white masthead lights is the vessel REQUIRED to show at night?（）