单项选择题
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
All of the following are distress signals EXCEPT（）.A.th...
单项选择题All of the following are distress signals EXCEPT（）.
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
All of the following are distress signals under the Rul...
单项选择题All of the following are distress signals under the Rules EXCEPT（）.
A.a green star signal B.orange-colored smoke C.red flares D.the repeated raising and lowering of outstretched arms
What is NOT a distress signal?（）.A.Red flares or red ro...
单项选择题What is NOT a distress signal?（）.
A.Red flares or red rockets B.Continuous sounding of fog signaling apparatus C.International Code Flags November and Charlie D.Basket hanging in the rigging
