restricted in her ability to maneuver
not under command
engaged in mineclearing operations
constrained by her draft
第1题：
A vessel engaged in fishing，and at anchor，shall show ______.
A.an anchor light
B.sidelights and a stern light
C.three lights in a vertical line，the highest and lowest being red，and the middle being white
D.None of the above
第2题：
A vessel not under command making way at night would show ______.
A.two all-round red lights in a vertical line
B.anchor lights and sidelights
C.two all-round white lights in a vertical line，sidelights and a stern light
D.two all-round red lights in a vertical line，sidelights，and a stern light
第3题：
Which vessel may show three lights in a vertical line，the top and bottom being red and the middle being white?
A.A vessel engaged in diving operations
B.A pilot vessel
C.A vessel trawling
D.All of the above
第4题：
Survey vessel
Vessel not under command
Vessel aground
Pilot vessel with port side to you
第5题：
A vessel servicing a pipeline during the day shall display ______.
A.three black shapes in a vertical line; the highest and lowest are balls，and the middle one is a diamond
B.three shapes in a vertical line; the highest and lowest are red balls，and the middle one is a white diamond
C.three black balls in a vertical line
D.two black balls in a vertical line
第6题：
A vessel is carrying three lights in a vertical line. The highest and lowest of these are red and the middle light is white. Which statement is always TRUE?
A.During the day，she would display three balls in a vertical line
B.If making way，she would show masthead lights at night
C.If at anchor，she need not show anchor lights while displaying identifying lights
D.Her fog signal would consist of a rapid ringing of a bell for five seconds every minute
第7题：
A vessel not under command shall display ______.
A.two red lights at night and two black balls during daylight
B.two red lights at night and three black balls during daylight
C.three red lights at night and two black balls during daylight
D.three red lights at night and three black balls during daylight
第8题：
A vessel displaying three red lights in a vertical line is ______.
A.restricted in her ability to maneuver
B.not under command
C.engaged in mineclearing operations
D.constrained by her draft
第9题：
a red light over a white light
a white light over a red light
a green light over a white light
two red lights in a vertical line
第10题：
not under command
aground
dredging
constrained by her draft