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（）.

单项选择题 You are landing a single-screw vessel，with a right-hand propeller，starboard side to the dock.When you have approached the berth and back the engine，you would expect the vessel to （）.

单项选择题 You are entering port and have been instructed to anchor，as your berth is not yet available.You are on a SW’ly heading，preparing to drop anchor，when you observe the range lights as shown on your starboard beam.You should（）.