A stretch where the channel changes from one side of the river to the other is called a （）.

A.the direction the storm has come from
B.the direction in which the storm is moving
C.the speed at which the storm is moving
D.the path taken by the storm

A.required to give way in a crossing situation
B.required to sound the first passing signal in a meeting situation
C.free to maneuver in any crossing or meeting situation as it has the right-of-way
D.required to maintain course and speed in a crossing situation but may take action to avoid collision

A.over the bow or stern of a vessel
B.over the flat sides of a vessel
C.over the open water
D.over the dockside