A、at anchor
B、towing a submerged object
C、being overtaken in a narrow channel
D、in distress
更多“A whistle signal of one prolonged，one short，one prolonged and one short blast，is sounded by a vessel（）.”相关的问题
A、A.More than six short blasts and one long blast on the whistle B、B.Continuous blast of the ships whistle for a period of not less than 10 seconds supplemented by the same signal on the general alarm C、C.Three short blasts of the whistle supplemented by the same signal on the general alarm D、D.More than six short blasts and one long blast on the whistle supplemented by the same signal on the general alarm
A、3 short blasts of the ship's whistle B、1 short blast of the ship's whistle C、3 long blasts of the ship's whistle D、1 long blast of the ship's whistle
A、a light signal of at least five short and rapid flashes B、one prolonged，one short，one prolonged，and one short whistle blasts C、four short whistle blasts D、two short whistle blasts
A、more than 6 short blasts and 1 long blast on the whistle，and the same signal on the general alarm B、continuous sounding of the ship's whistle and the general alarm for at least 10 seconds C、1 short blast on the whistle D、alternating short and long blasts on the ship's whistle
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
A、A.Directing the beam of a searchlight at another vessel B、B.A smoke signal giving off orange colored smoke C、C.A whistle signal of one prolonged and three short blasts D、D.International Code Signal PAN spoken over the radiotelephone
A、A.When any vessel fails to understand the intentions of an approaching vessel she must sound the danger signal B、B.Only the stand-on vessel can sound the danger signal C、C.Distress signals may be used in place of the danger signal D、D.The danger signal consists of 4 or more short blasts of the whistle
A、A rapid ringing of a bell for 5 seconds every two minutes B、A whistle signal of one short，one prolonged，and one short blast C、A prolonged blast of the whistle at intervals not to exceed one minute D、A rapid ringing of a bell for 5 seconds，preceded and followed by three separate and distinct strokes on the bell
A、the continuous sounding of any fog signal apparatus B、giving five or more short and rapid blasts of the whistle C、firing a gun at intervals of about a minute D、a barrel with burning oil in it，on deck
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