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
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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
A.red
B.red and white
C.green
D.green and white
最新試題
A single towing light will be carried above a vessel’s sternlight（）.
The prohibition against displaying lights which may be confused with required navigation lights applies（）.
Environmental loading consists of the forces caused by wind，waves，and（）.
Approaching an anchorage in fog，you hear one short，one prolonged，and one short blast in that sequence on a ship’s whistle． This indicates（）.
At sea，you are approaching a small vessel and see that it has the signal flag P hoisted. What should you do?（）.
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?（）
An inconspicuous，partly submerged vessel or object being towed，where the length of tow is 100 meters，shall show（）.
On entering from seaward，a starboard side daymark will（）.
A triangular daymark would be colored（）.
According to the Rules，when should lights be displayed?（）.