power-driven vessel stopped and making no way through the water
vessel being towed
vessel restricted in her ability to maneuver at anchor
sailing vessel at anchor
第1题：
A pilot vessel may continue to sound an identity signal if she is ______.
A.underway，but not making way
B.aground
C.being towed
D.not engaged in pilotage duty
第2题：
On the high seas，a fog signal consisting of one prolonged blast followed by four short blasts would indicate the presence of a ______.
A.vessel being towed
B.fishing vessel engaged in trawling
C.vessel at anchor warning you of her location
D.power-driven pilot vessel on station underway
第3题：
According to the navigation rules, all of the following are engaged in fishing except a vessel ______.
A.Setting nets
B.Trawling
C.Using a dredging net
D.Trolling
第4题：
A vessel sailing shall keep out of the way of all of the following vessels except a vessel ______.
A.not under command
B.engaged on pilotage duty
C.restricted in her ability to maneuver
D.engaged in fishing
第5题：
A vessel aground would show the same dayshape as a ______.
A.vessel towing a submerged object
B.dredge underway and dredging
C.hydrographic survey vessel at anchor and surveying
D.None of the above
第6题：
A rigid replica of the International Code flag "A" may be shown by a vessel ______.
A.pulling a submarine cable
B.engaged in diving operations
C.engaged in underway replenishment
D.transferring explosives
第7题：
A fishing vessel displaying the lights shown is ______.
A.anchored
B.underway but not fishing
C.tending a small fishing boat
D.fishing by trawling
第8题：
A power-driven fishing vessel is underway on the high seas and is not engaged in fishing． Which of the following factors determines what lights she will show？
A.Whether she is normally a fishing or a trawling vessel
B.Her gross tonnage
C.Her length
D.The type of gear she carries
第9题：
A vessel engaged in ______ shall not impede the passage of any other vessel navigating within a narrow channel or fairway．
A.mine clearance operation
B.towing operation
C.dredging or surveying or underwater operation
D.fishing
第10题：
A vessel not under command sounds the same fog signal as a vessel ______.
A.engaged in towing
B.constrained by her draft
C.under sail
D.All of the above