单项选择题
A 200-meter vessel restricted in her ability to maneuver，at anchor，will sound a fog signal of（）.
A.a 5 second ringing of a bell forward and a 5 second sounding of a gong aft at intervals of 1 minute
B.one prolonged followed by two short blasts every 2 minutes
C.one prolonged followed by three short blasts every minute
D.one prolonged followed by three short blasts every 2 minutes
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相关考题
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单项选择题
A 200-meter vessel is aground in fog. Which signal is optional? （）
A.A bell signal
B.A gong signal
C.A whistle signal
D.All of the above -
单项选择题
A vessel will NOT show sidelights when（）.
A.underway but not making way
B.making way，not under command
C.not under command，not making way
D.trolling underway -
单项选择题
Two short blasts of the whistle have all of the following meanings EXCEPT（）.
A.I intend to meet you starboard to starboard
B.I do not intend to hold course and speed
C.I intend to overtake you on your port side
D.I intend to alter my course to port
