单项选择题
A.spooling it on a winch cathead
B.coiling it in a counterclockwise direction on the fantail
C.faking it on deck in a fore and aft direction
D.spooling it on a reel lying on its side to prevent rolling
单项选择题 A drilling bit which is doughnut shaped to permit recovery of the center portion of the hole drilled is called a（）.
单项选择题 A drawbridge may use visual signals to acknowledge a vessel’s request to open the draw. Which signal indicates that the draw will NOT be opened immediately?（）
单项选择题 A Doppler speed log indicates speed through the water（）.