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
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?（）.
The prohibition against displaying lights which may be confused with required navigation lights applies（）.
The duration of a prolonged blast of the whistle is（）.
A towing light is a yellow light having the same characteristics as a(n)（）
A power-driven vessel underway shall keep out of the way of（）.
A safe water daymark has what shape? （）
A power-driven vessel，when towing astern，shall show（）.
The International Regulations for Preventing Collisions at Sea contain the requirements for （）.
A triangular daymark would be colored（）.
A vessel being towed astern，where the length of the tow exceeds 200 meters，will exhibit （）.