单项选择题
A.flashing amber light B.yellow light with the same characteristics as the sternlight C.all-round yellow light D.yellow light with the same characteristics as the masthead light
The term OIL as used in the Oil Pollution Regulations m...
单项选择题The term OIL as used in the Oil Pollution Regulations means（）.
A.fuel oil B.sludge C.oil refuse D.All of the above
The radiotelephone safety message urgently concerned wi...
单项选择题The radiotelephone safety message urgently concerned with safety of a person would be prefixed by the word（）.
A.Mayday B.Pan C.Safety D.Interco
The radiotelegraph alarm signal is（）.A.SOS sent three t...
单项选择题The radiotelegraph alarm signal is（）.
A.SOS sent three times B.ten one-second dashes with a four-second interval between them C.twelve four-second dashes with a one-second interval between them D.twelve one-second dashes with a short interval between them
