If the towing bridle legs are not of equal length（）.

单项选择题If a vessel under tow starts jumping on its tow line，the most appropriate action to alleviate the condition is to（）.

A.change course
B.slow down
C.heave to
D.adjust tow line length

单项选择题If a towing vessel and her tow are severely restricted in their ability to change course，they may show lights in addition to their towing identification lights. These additional lights may be shown if the tow is（）.

A.pushed ahead
B.towed alongside
C.towed astern
D.Any of the above

单项选择题How does the effect known as bank suction act on a single-screw vessel proceeding along a narrow channel?（）.

A.It pulls the bow toward the bank
B.It pushes the entire vessel away from the bank
C.It pulls the stern toward the bank
D.It heels the vessel toward the bank

单项选择题For the deepest water when rounding a bend in a river，you should navigate your vessel（）.

A.toward the inside of the bend
B.toward the outside of the bend
C.toward the center of the river just before the bend，then change course for the river's center after the bend
D.in the river's center

单项选择题Catenary as applied to tow lines denotes the（）.

A.dip of the line
B.stretch of the line
C.strain on the line
D.length of the line