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Approved by DC-E USCG AuxA, Inc 1 Boating Skills & Seamanship Lesson 11 Lines & Knots for Your Boat.

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Presentation on theme: "Approved by DC-E USCG AuxA, Inc 1 Boating Skills & Seamanship Lesson 11 Lines & Knots for Your Boat."— Presentation transcript:

1 Approved by DC-E USCG AuxA, Inc 1 Boating Skills & Seamanship Lesson 11 Lines & Knots for Your Boat

2 2 Lesson Objectives Materials used in making rope Use, selection and care How to store rope About rope/line hardware Useful knots How to secure the boat’s line

3 3 Marlinspike Seamanship Art of handling & working all kinds of fiber, synthetic & wire rope Includes –Knotting, splicing, worming, parceling, serving & fancy work What to a landlubber is - ROPE To a seaman is - LINE

4 4 Type of Line Natural –Manila, Sisal –Shrink when wet and rot when dry –Weaker size for size than synthetics

5 5 Type of Line (cont’d) Synthetics –Nylon –Strongest size for size of synthetic –Stretches most, resists chafing –Does not shrink when wet –Good for dock lines, towing and anchoring

6 6 Line Natural fiber –Manila, Sisal, Hemp, Jute, Cotton, Flax Synthetic –Nylon, Polyester (Dacron), Polypropylene Wire Rope –Steel strands

7 7 Natural Fiber Line Best is Manila –Has strength, durability & minimal stretch Sisal is cheaper, but inferior Disadvantages –Shrink when wet –Rot if stowed wet –Size for size, weaker than synthetic

8 8 Synthetic Line General - good wet/dry strength, resists water, mildew & rot Nylon - strongest, resists chafe, has most stretch, good for anchor and mooring

9 9 Synthetic Line (cont’d) Polyester - costs more than nylon, easier & smoother to handle, use anytime, no stretch Polypropylene - floats, costs less, deteriorates in sunlight, hard, slips on cleats, cuts

10 10 Manufacture of Line Laid –Right laid –Left laid Braided –Single braided –Double braided

11 11 Kinds of Rope Braid Twist

12 12 Composition of Right Laid Line fibers yams strands rope

13 13 Double Braided Line core

14 14 Wire Rope Maximum STRENGTH Minimum STRETCH Used mostly on sailboats for standing and running rigging Used on davits

15 15 Yachting Ropes Diameter 1/4” 3/8” 1/2” 5/8” 3/4” 7/8” 1” 1-1/8” (lbs) weight Per 100ft (lbs) Breaking Strength 1,750 3,200 6,600 10,200 13,500 18,500 24,000 32,000 (lbs) Weight Per 100ft (lbs) Breaking Strength 1,300 2,850 4,900 7,800 10,780 14,000 17,500 23,500 (lbs) Weight Per 100 ft (lbs) Breaking Strength 600 1,350 2,650 4,400 5,400 7,700 9,000 12,000 WEIGHT AND STRENGTH COMPARISON NYLONDACRONMANILA SIZE

16 16 “Ends” of Line Ends need to be protected from fraying & unlaying Ends can be –Whipped with thread/small stuff –Taped with waterproof tape –Dipped in plastic liquid –Melted with heat/flame

17 17 Temporary Whipped startfinishPull & cut

18 18 Making Up Lines Faking –Laying out line in figure eights so it is free to run without tangles Flemishing –Neat, ornamental way to store line on deck Coiling –Proper way to put line away in a locker or compartment Coiling Faking Flemishing

19 splices knots Losing Strength in Rope No knots or splices Anchor or Fisherman’s bend Timber hitch Round turn Two Half-hitches Bowline Clove hitch Sheet bend or Weaver’s knot Square or Reef knot Eye splice Long splice Short splice

20 20 Parts of a Line Working End Standing Part Bitter End Overhand Loop Underhand Loop

21 21 Round Turn

22 22 Basic Mariner’s Knots & Bends Figure 8 Square Knot Clove Hitch Sheet of Becket Bend Anchor Bend Timber Hitch Bowline Half Hitches Rolling Hitch

23 23 Figure 8 The Stopper Knot It can be untied after being jammed Used on all lines on sailboat except spinnaker sheets

24 24 Square Knot Reef Knot - Alternate name –Used to secure reefed sail to boom –Fasten two lines of equal size –Difficult to untie if jammed To tie –Right over left, then –Left over right

25 25 Clove Hitch Used to tie line to piling Knot will jam under load Difficult to untie if load cannot be relieved

26 26 Sheet Bend Becket Bend - alternate name Ties two unequal sized lines together Easy to untie after heavy strain

27 27 Two Half Hitches Used to tie a line to a Ring, Piling, Post or Grommet Easier to untie under tension and more permanent than a clove hitch

28 28 To tie a line permanently to a piling Round Turn with 2 Half Hitches

29 29 Anchor or Fisherman’s Bend

30 30 To make a temporary loop –The rabbit comes up through the hole –Around the tree –Then back down into the hole The Bowline

31 31 The King of Knots Easy to untie Tie Jib sheets to Clew of Jib Tie lines to fittings Tie lines of equal or unequal size together Tie a rode to an anchor The Bowline

32 32 Bowline

33 33 Timber Hitch

34 34 Rolling Hitch Around once Around again, cross over first turn passing between the first turn and the standing part of its own line Tie a half hitch

35 35 Cleats and Chocks

36 36 Mooring Cleat

37 37 Belaying to a Cleat

38 38 Jam Cleat Working End Standing Part

39 39 Lark’s Head

40 40 Cam Cleat

41 41 Used to protect boat and line Chock

42 42 Use “through bolts” and backing block Securing Cleats Backing Block Deck

43 43 Securing Lines Samson Post Bow Bitts

44 44 Other boat’s eye on piling Your eye can be removed or put on without disturbing the other boat’s line Dipping the Eye

45 45 Turnbuckle

46 46 On a vessel, pulleys are called blocks Blocks Shell Pin shackle Outer Strap Inner Strap Sheaves Thimble Becket Cheek

47 47 Double Sheave Block

48 48 Thimble

49 49 Special Lines Lead Line Measures Depth of Water Weighted with a lead weight (Hollow end for bottom sample)

50 50 Stern line Bow line Breast line Spring line Dock Lines

51 51 Spring line Bow/Stern lines Dock Lines

52 52 Fenders

53 53 Natural fiber vs. Synthetic line Laid vs. Braided line Coiling, Faking, Flemishing Knots, Bends, Hitches Splices Securing lines Dipping the Line Summary


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