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Tylers Stuff > Towing and Trailering > Flashcards

Towing and Trailering Flashcards

1
Q

The two forces that affect towing?

A

Static and Dynamic

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2
Q

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

A

Frictional resistance

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3
Q

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

A

Form Drag

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4
Q

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

A

Shock load

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5
Q

A dip in the towline caused by its weight?

A

Catenary

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6
Q

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

A

5’-20’

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7
Q

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

A

30-45 degrees

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8
Q

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

A

40

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9
Q

What are most towlines usually made of?

A

Double braided nylon

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10
Q

The length of a towline can be as long as?

A

900 ft

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11
Q

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

A

Small stuff

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12
Q

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

A

Eye splice

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13
Q

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

A

No

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14
Q

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

A

4

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15
Q

Damage to line caused by overheating or over-stretching?

A

Fusing

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16
Q

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

A

Large vessels or Steel huls

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17
Q

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

A

Pendant

18
Q

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

A

Less than 30 degrees

19
Q

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

A

Messenger

20
Q

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

A

75 ft

21
Q

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

A

Float line

22
Q

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

A

Thimble

23
Q

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

A

Drogue

24
Q

How long is the drogue towline?

A

200 ft of 2” double braid

25
Q

The drogue line is marked every?

A

50 ft

26
Q

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

A

Danger zone

27
Q

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

A

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

28
Q

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?

A

Less

29
Q

Current flowing directly against the steered course?

A

Head current

30
Q

Current flowing in the same direction as the course steered?

A

Tail current

31
Q

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

A

Cross current

32
Q

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

A

15 degress

33
Q

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

A

Base curb weight (BCW)

34
Q

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

A

Gross vehicle weight (GCW)

35
Q

The maximum allowable weight of the fully loaded vehicle?

A

Gross vehicle weight rating (GVWR)

36
Q

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

A

Gross combination weight (GCW)

37
Q

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

A

10 -15%

38
Q

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

A

8 ft

39
Q

How are safety chains attached to the tow vehicle?

A

Criss-crossed

40
Q

What is the max speed when towing any trailer?

A

55 mph

41
Q

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

A

2 vehicle lengths

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