单项选择题
Which signal is recognized as a distress signal?（）.
A.Directing the beam of a searchlight at another vessel
B.A smoke signal giving off orange colored smoke
C.A whistle signal of one prolonged and three short blasts
D.International Code Signal PAN spoken over the radiotelephone
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相关考题
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单项选择题
A RADIO SIGNAL FROM A DISTRESSED VESSEL AUTOMATICALLY DIRECTED TO A RCC GIVING POSITION，IDENTIFICATION，COURSE AND SPEED OF THE VESSEL AS WELL AS THE NATURE OF DISTRESS is known as（）.
A.Distress alert
B.Safety alert
C.Emergency alert
D.General alert -
单项选择题
You receive a call from the MSA OF CHINA addressed to all stations. The call begins with the words Pan-Pan (3 times). Which type of emergency signal would this be?（）.
A.Safety signal
B.Urgency signal
C.Distress signal
D.Red alert signal -
单项选择题
A continuous sounding of a fog-signal apparatus indicates（）.
A.the vessel is in distress
B.the vessel has completed loading dangerous cargo
C.it is safe to pass
D.the vessel is anchored
