A vessel showing a green light over a white light in a vertical line above the level of the sidelights is .(1.0)
A.engaged in underwater construction B.under sail and power C.a pilot vessel D.trawling正确答案D
A vessel showing a green light over a white light in a vertical line above the level of the sidelights is .(1.0)
A.engaged in underwater construction B.under sail and power C.a pilot vessel D.trawling正确答案D
