单项选择题
A.Pay out all of the cable before setting up on the brake to insure the anchors dig in and hold
B.For a mud，mud and clay，or sandy bottom pay out a scope of 5 to 7 times the depth before setting up on the brake
C.Use one or both anchors with a scope of twice the depth before setting the brake
D.Drop the anchor to short stay and hold that scope
单项选择题 You are planning to anchor in an area where several anchors have been lost due to fouling.As a precaution，you should（）.
单项选择题 You are mooring to a buoy．You should approach the buoy with the current from（）.
单项选择题 You are making a sharp turn in a channel and using a buoy four points on the bow to gauge your rate of turn.If you observe the buoy moving aft relative to you，what should you do（）.