單項(xiàng)選擇題A vessel not under command sounds the same fog signal as a vessel().

A.towing
B.constrained by her draft
C.under sail
D.All of the above


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1.單項(xiàng)選擇題A vessel displaying three red lights in a vertical line is().

A.not under command
B.aground
C.dredging
D.constrained by her draft

2.單項(xiàng)選擇題A vessel constrained by her draft may display().

A.three all-round red lights instead of the lights required for a power-driven vessel of her class
B.the same lights as a vessel restricted in her ability to maneuver
C.three all-round red lights in addition to the lights required for a power-driven vessel of her class
D.the lights for a power-driven vessel which is not under command

3.單項(xiàng)選擇題A vessel constrained by her draft may display().

A.three all-round red lights
B.two 225°red lights
C.three all-round blue lights
D.two 225°blue lights

4.單項(xiàng)選擇題A towing light is().

A.shown below the sternlight
B.white in color
C.displayed at the masthead
D.a yellow light having the same characteristics as the stern light

5.單項(xiàng)選擇題A towing light is().

A.shown at the bow
B.white in color
C.shown in addition to the sternlight
D.an all-round light