A tow bridle is attached to the main tow hawser at the（）.

A tug is "in irons" when held in a fixed position by ______.

A.the weight of its tow，its being anchored，or grounded

B.the weight of its towing hawser on the bottom

C.an adverse current

D.lack of power or an engine breakdown

With a large tow astern，there is immediate danger to the tug in the event of the ______．

A.Tug losing power

B.Tow line parting

C.Bridle twisting

D.Tow broaching

One advantage of chain over wire rope for a tow bridle is that chain ______.

A.is better suited for inland towing

B.resists damage from chafing

C.handles more easily

D.equalizes towing forces better

A tow astern is veering from side to side on its towline．The best way of controlling the action is to ______．

A.Trim the tow by the bow

B.Trim the tow by the stern

C.List the tow to windward

D.Adjust the length of the towing bridle

A chain bridle is preferable to a wire rope towing bridle on a long ocean tow because chain ______.

A.is more flexible and has the ability to absorb shock because of its weight

B.is less subject to wear and damage from abrasion

C.requires little maintenance

D.All of the above

The choice of length of tow bridle legs is governed by the ______．

A.Expected towing forces

B.Capability of retrieving gear

C.Freeboard of the unit being towed

D.Need to reduce yaw

Before leaving port on an ocean tow，a tug captain should assure himself of all the following EXCEPT ______.

A.the towing hawser can be released quickly in an emergency

B.the correct navigation lights are rigged and operable on the tug and tow

C.an insurance underwriter has prepared a pre-sailing survey

D.a pick-up wire has been rigged on the tow in case of a breakaway.

A chain bridle is used when towing astern because it ______.

A.is easy to connect

B.provides an effective catenary and absorbs shock due to its weight

C.makes rigging a swivel unnecessary

D.prevents the tow from yawing by the drag of the chains in a seaway