A power-driven vessel leaving a quay or wharf must sound what signal? .(1.0)
A.Three short blasts B.A long blast C.A prolonged blast D.No signal is required正确答案D
A power-driven vessel leaving a quay or wharf must sound what signal? .(1.0)
A.Three short blasts B.A long blast C.A prolonged blast D.No signal is required正确答案D
