单项选择题
A storm is forecast for the area where your vessel is moored. For its safety you should put （）.
A.more slack in the mooring lines B.a strain on the mooring lines C.chafing gear on the mooring lines D.grease on the mooring lines
单项选择题 A steep barometric gradient indicates （）.
单项选择题 A stand-on vessel in a crossing situation is allowed to take action when （）.
单项选择题 A marker pole，with a horseshoe buoy and a sea anchor attached，should be used to （）.
