Towing and Trailering

Question 1

The two forces that affect towing?

Answer 1

Static and Dynamic

Question 2

The layer of water immediately in contact with the hull while it moves and creates drag?

Answer 2

Frictional resistance

Question 3

Created by the design of the hull and how it reacts to motion thorough the water?

Answer 3

Form Drag

Question 4

The rapid, extreme increase in tension on the towline, which transfers through the tow rig and fittings to both vessels?

Answer 4

Shock load

Question 5

A dip in the towline caused by its weight?

Answer 5

Catenary

Question 6

How much more stretch would another 50’ of towline give to act as a shock-load absorber?

Answer 6

5’-20’

Question 7

Ideal towing course should be ___ to ___ degrees off either side of dead ahead or dead astern?

Answer 7

30-45 degrees

Question 8

Some nylon cordage can stretch up to additional ___ percent of its length before parting?

Answer 8

40

Question 9

What are most towlines usually made of?

Answer 9

Double braided nylon

Question 10

The length of a towline can be as long as?

Answer 10

900 ft

Question 11

The bitter end of towline is attached to the tow reel by what?

Answer 11

Small stuff

Question 12

When putting new cordage in service as a towline, what should be done to both ends?

Answer 12

Eye splice

Question 13

Can tow reels with mechanical advantage or electric motors be used to retrieve a towline under tension?

Answer 13

No

Question 14

Unless slipping the towline in an emergency, at least how many turns of towline should be kept on the reel?

Answer 14

4

Question 15

Damage to line caused by overheating or over-stretching?

Answer 15

Fusing

Question 16

Wire rope should be used to tow what type of vessels?

Answer 16

Large vessels or Steel huls

Question 17

A _____ is used to reduce wear and chafing at the towline end?

Answer 17

Pendant

Question 18

What angle should the legs of a bridle be to reduce the amount of tension?

Answer 18

Less than 30 degrees

Question 19

A length of light line used to carry a larger line or hawser between vessels?

Answer 19

Messenger

Question 20

A heaving line equipped with a rubber ball or monkeys fist should be at least how long?

Answer 20

75 ft

Question 21

A buoyant synthetic line attached to a ring buoy or float, deployed upstream or upwind?

Answer 21

Float line

Question 22

Designed to equalize the load on an eye of a line and provide max chafing protection?

Answer 22

Thimble

Question 23

This device is deployed at the stern of the towed vessel to help control the vessel’s motions?

Answer 23

Drogue

Question 24

How long is the drogue towline?

Answer 24

200 ft of 2” double braid

Question 25

The drogue line is marked every?

Answer 25

50 ft

Question 26

Before starting the approach of a vessel in need of tow, a ________ sould be established?

Answer 26

Danger zone

Question 27

When what is the formula for calculating max safe tow speed?

Answer 27

S = 1.34 x Lw and Ss = S - (.1 x S) S = max tow speed Ss = max safe tow speed Lw = square root of length at waterline

Question 28

The effect of current on vessel navigation at 12-30 knots is greater than or less than the effect while towing at 6-8 knots?

Answer 28

Less

Question 29

Current flowing directly against the steered course?

Answer 29

Head current

Question 30

Current flowing in the same direction as the course steered?

Answer 30

Tail current

Question 31

A current that is flowing for either side, across the intended track?

Answer 31

Cross current

Question 32

At a towing speed of 7 knots, a 2 knot cross current will require a heading offset of over \_\_\_\_?

Answer 32

15 degress

Question 33

The weight of the vehicle with a full load of fuel, with no passengers or cargo?

Answer 33

Base curb weight (BCW)

Question 34

The base curb-weighted plus the weight of passengers and cargo?

Answer 34

Gross vehicle weight (GCW)

Question 35

The maximum allowable weight of the fully loaded vehicle?

Answer 35

Gross vehicle weight rating (GVWR)

Question 36

The weight of the towing vehicle and fully loaded trailer, including passenger and cargo?

Answer 36

Gross combination weight (GCW)

Question 37

The trailor tongue weight should be how many percent of the total trailer weight?

Answer 37

10 -15%

Question 38

Without a special permit, what is the widest trailered boat allowable on most state roads?

Answer 38

8 ft

Question 39

How are safety chains attached to the tow vehicle?

Answer 39

Criss-crossed

Question 40

What is the max speed when towing any trailer?

Answer 40

55 mph

Question 41

For every 10 mph of speed, how many car lengths of distance should you have between you the vehicle ahead of you?

Answer 41

2 vehicle lengths