A.Limited backing power of his vessel B.Radar information about nearby vessels C.The occupation of the other vessel，if known D.All of the above
A.Sidelights and a stern light B.Sidelights only C.Sidelights and a small white light at each end D.A small white light at each end
A.three balls in a vertical line B.two balls in a vertical line C.one ball near the foremast and one ball at each fore yard D.one diamond near the foremast head and one ball at each fore yard
A.two all-round red lights in a vertical line B.three all-round red lights in a vertical line C.two all-round yellow lights in a vertical line D.three all-round green lights in a vertical line
A.stop your engines B.sound two prolonged blasts of the whistle C.sound the danger signal D.slow to bare steerageway
