A towline should be fastened to（）.

A tug is best positioned for towing and maneuvering on rivers and other restricted waters where wave action is limited when（）.

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

A slow，gradual fall of the barometer indicates approaching（）.

A sufficient amount of chain must be veered when anchoring a vessel to ensure（）.

A storm’s track is characterized by all of the following except（）.

A special daymark is a（）.

A tackle is “two blocked” when the blocks are（）.

A traffic separation zone is that part of a traffic separation scheme which（）.

A tow of 9 barges is made up three abreast by three long. The towboat is faced up to the last barge of the center string. The outer two strings of barges are the（）.