单项选择题
A.comes over the bow
B.blows the fire back toward the vessel
C.comes over the stern
D.comes over either beam
单项选择题 A fiber towing hawser is readied for service by（）.
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?（）