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单选题
A fog signal consisting of one prolonged blast followed by four short blasts would indicate thepresence of a（）.
A
vessel being towed
B
fishing vessel engaged in trawling
C
vessel at anchor warning of her location
D
power-driven pilot vessel on station underway
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单选题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（）.A
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单选题A 200-meter vessel restricted in her ability to maneuver，at anchor，will sound a fog signal of（）.A
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考题
单选题A fog signal consisting of one prolonged blast followed by four short blasts would indicate thepresence of a（）.A
vessel being towedB
fishing vessel engaged in trawlingC
vessel at anchor warning of her locationD
power-driven pilot vessel on station underway
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单选题A vessel sounding a fog signal of one short，one prolonged，and one short blast is indicating that the vessel is（）.A
fishingB
in distressC
at anchorD
not under command
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单选题A whistle signal of one prolonged，one short，one prolonged and one short blast，is sounded by a vessel（）.A
at anchorB
towing a submerged objectC
being overtaken in a narrow channelD
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单选题A 95-meter vessel aground sounds which fog signal? （）A
A rapid ringing of a bell for 5 seconds every two minutesB
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A rapid ringing of a bell for 5 seconds，preceded and followed by three separate and distinct strokes on the bell
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