Towing Endorsement

Question 1

1) The measurement of the amount of force a towing vessel is capable of applying to a
motionless tow is called

Answer 1

bollard pull.

Question 2

A towing vessel’s capability is best measured by horsepower, bollard pull, maneuverability
and .

Answer 2

displacement

Question 3

An ocean towing bridle should have

Answer 3

equal legs of sufficient length.

Question 4

A towing vessel becomes tripped while towing on a hawser astern. The factor which is most
important when assessing the risk of capsizing is the

Answer 4

height of the towline connection.

Question 5

A towing vessel is tripped when it is pulled

Answer 5

sideways by the tow.

Question 6

term used to describe the dip in a towline that acts as a shock absorber is

Answer 6

catenary.

Question 7

Fittings used for towing must be

Answer 7

securely fastened.

Question 8

The size and material used for towline(s) must meet all of the following requirements,
except f

Answer 8

it any spare wire clips carried on board the vessel for repair purposes.

Question 9

In towing, heaving lines are used for

Answer 9

passing a messenger line.

Question 10

The owner or Master of a towing vessel shall ensure that each person that directs and
controls the movement of the vessel can accomplish all of the following except reduce
speed only where local speed limits are posted.

Answer 10

reduce speed only where local speed limits are posted.

Question 11

The greatest danger of an overriding tow is

Answer 11

collision between the tow and the stern of

the towing vessel.

Question 12

12) On a long ocean tow, the bridle should be made up of two equal lengths of .

Answer 12

chain

Question 13

13) A tow bridle is attached to the main hawser at the

Answer 13

fishplate.

Question 14

The tow makeup that is designed to keep the catenary of the tow hawser to a minimum is
called the

Answer 14

christmas tree tow.

Question 15

A tug is approaching a broken down steamer in moderately heavy weather preparing to take
it in tow. In most cases the tug should approach from

Answer 15

downwind.

Question 16

The owner or Master of a vessel pushing ahead or towing alongside must ensure that each
of the following is appropriate for the vessel’s horsepower and tow arrangement except

Answer 16

hydraulic coupling.

Question 17

In regards to towing “in step” refer to both

Answer 17

the towed and towing vessels reach a wave crest or trough at the same time.

Question 18

A vessel brought alongside should be fended off the towing vessel by .

Answer 18

fenders

Question 19

The towing method which maintains the most control over the tow is a

Answer 19

breasted tug towing.

Question 20

The action which should be taken first if your tow is sinking in shallow water is

Answer 20

payout the

towline until the sunken tow reaches bottom

Question 21

To reduce stress on the towing hawser when towing astern (ocean tow), the hawser should
be .

Answer 21

underwater

Question 22

When towing astern the equipment which should be stowed ready for use near the towline
is

Answer 22

axe or cutting torch.

Question 23

On a shallow water tow, the catenary of the towline should be .

Answer 23

small

Question 24

When towing astern, you notice that another vessel is about to pass between the towing
vessel and the tow. You should immediately

Answer 24

slow down and payout the main tow

hawser.

Question 25

An ocean tow is sinking in deep water. Attempts to sever the towing hawser are unsuccessful. The action which should now be taken is

Answer 25

slip the towline and allow it to | run off of the drum.

Question 26

Nylon line is better suited than manila for

Answer 26

towing astern

Question 27

The catenary in a towline is the

Answer 27

downward curvature of the hawser.

Question 28

______forward will not reduce yawing of a tow.

Answer 28

Stowing deck loads

Question 29

)In regards to towing, "step" refer to

Answer 29

both the towed and the towing vessels reach a | wave crest or trough at the same time.

Question 30

Catenary as applied to tow lines denotes the

Answer 30

dip of the line.

Question 31

Stern towing bitts are placed well forward of the rudder when hawser towing to allow the

Answer 31

stern to swing more freely when using rudder.

Question 32

The line with the most stretch is

Answer 32

nylon.

Question 33

A chain bridle is used when towing astern because it

Answer 33

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

Question 34

A predictable result of a vessel nearing a bank or edge or a channel is that the

Answer 34

stern is | drawn to the bank as the bow sheers off.

Question 35

The knot used to join two lines or two large hawsers for towing is called

Answer 35

carrick bend.

Question 36

In regard to a wire towing hawser the term "end-for-end" refer to

Answer 36

removing the wire rope from the drum and reversing it so that the towing end becomes the bitter end.

Question 37

The biggest problem you generally encounter when towing a single tow astern is .

Answer 37

yaw

Question 38

When towing, sudden shock-loading caused during heavy weather can be reduced by using

Answer 38

a heavier hawser

Question 39

Your vessel is being towed and back-up wires have been installed. Back-up wires carry the towing load in the event that the

Answer 39

towing bitt or pad-eye fails.

Question 40

___will not reduce yawing of a tow

Answer 40

Trimming the tow by the bow

Question 41

A vessel being towed alongside should be positioned at the stern of the towed vessel

Answer 41

forward of the stern of the towing vessel for increased maneuverability.

Question 42

The Honolulu (Christmas tree) tow was devised to

Answer 42

allow easy removal of a center tow

Question 43

You are being towed by one tug. As you lengthen the bridle legs

Answer 43

you reduce the yawing of the vessel.

Question 44

Your vessel is being towed and you are using a tripping rope. A tripping rope of fiber or wire is used to

Answer 44

retrieve the outboard legs of the bridle where they are connected to the fishplate.

Question 45

_____ could be used as fairleads on a towed vessel.

Answer 45

All of the above

Question 46

) When making up a tow connection you should use

Answer 46

screw pin shackles.

Question 47

While towing it is desirable for the tug and the tow to ride wave crests simultaneously because

Answer 47

shock loading on the tow is reduced.

Question 48

The catenary in a towline is the

Answer 48

downward curvature of the hawser.

Question 49

) A tow span...

Answer 49

All of the above.

Question 50

A situation has occurred in which your vessel must be towed. When the towing vessel passes the towing line to you, you should secure the line to the

Answer 50

forward-most bitts.

Question 51

may prevent a tug from tripping or capsizing when towing a large vessel.

Answer 51

Stern towing pins

Question 52

When tandem tug towing, the more powerful of the two tugs should be

Answer 52

behind the lead | tug.

Question 53

When towing, a tow hook is used to provide

Answer 53

quick release of the hawser.

Question 54

The following statement concerning an automatic towing engine is not true;

Answer 54

as tension on | the hawser increases, more line is taken in by the automatic towing engine

Question 55

A tug is to assist in docking an oceangoing vessel on a hawser. The greatest danger to the tug

Answer 55

is from tripping.

Question 56

To reconnect the tow line after it has broken, it is better to use a polypropylene messenger line because.

Answer 56

it floats

Question 57

When towing astern, chafing gear should not be used on a hawser that is attached to a

Answer 57

self-tensioning winch.

Question 58

The pivot point of a towboat with a tow ahead is

Answer 58

one-third the length of the combined | unit back from the head.

Question 59

While towing sudden shock-loading caused during heavy weather can be reduced by

Answer 59

using a heavier hawser.

Question 60

When maneuvering from pull towing to breasted (alongside) towing, a twin-screw vessel is more likely than a single-screw vessel of equal horsepower

Answer 60

to foul the towline.

Question 61

Barges and vessels are ballasted before departure to

Answer 61

improve their stability

Question 62

When hip towing, a line led from the bow of the towboat aft to the barge would be a

Answer 62

towing line.

Question 63

Tugs sometimes shackle a length of chain into the towline in order to put

Answer 63

spring into the towline.

Question 64

When towing another vessel astern, the length of the towing line should be

Answer 64

such that the vessels will be "in step".

Question 65

A tug is approaching a broken down vessel to take it in tow in moderately heavy weather In most cases the tug should approach

Answer 65

from downwind.

Question 66

____ is used to prevent twisting of a towing bridle.

Answer 66

A fishplate

Question 67

When hip towing, a line led from the stern of the tug forward to the barge provides the towing pull when .

Answer 67

backing

Question 68

It is good practice to use long towlines for ocean tows because the

Answer 68

dip in the towline absorbs shock loads.

Question 69

When hip towing, a line led from the bow of the towboat aft to the barge would be a

Answer 69

towing line.