A.During the hours of darkness
B.At all times when underway
C.From sunset to sunrise and restricted visibility
D.Sunrise to sunset
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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
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
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
最新試題
The International Regulations for Preventing Collisions at Sea contain the requirements for （）.
An occulting light is one in which（）.
A towing light，according to the Rules，is a（）.
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?（）
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（）.
The prohibition against displaying lights which may be confused with required navigation lights applies（）.
A power-driven vessel towing another vessel astern (tow less than 200 meters) shall show （）.
A vessel towing is showing three forward white masthead lights in a vertical line. This means that the length of the（）.
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?（）.