During the navigational watch, _________shall be checked at sufficiently frequent intervals. ①course steered; ②arrangement of anchors; ③position; ④speed(1.0)
A.②③④ B.①②③ C.①②④ D.①③④正确答案D
During the navigational watch, _________shall be checked at sufficiently frequent intervals. ①course steered; ②arrangement of anchors; ③position; ④speed(1.0)
A.②③④ B.①②③ C.①②④ D.①③④正确答案D