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® 1 Seamanship Chapter 6 Anchoring, Mooring and Rafting.

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Presentation on theme: "® 1 Seamanship Chapter 6 Anchoring, Mooring and Rafting."— Presentation transcript:

1 ® 1 Seamanship Chapter 6 Anchoring, Mooring and Rafting

2 ® 2 Learning Objectives This session is intended to acquaint you with: This session is intended to acquaint you with: anchor types and equipment anchor types and equipment anchoring techniques anchoring techniques locations for effective anchoring locations for effective anchoring mooring and rafting mooring and rafting

3 ® 3 Anchoring The skill of securing the vessel to the bottom The skill of securing the vessel to the bottom

4 ® 4 Anchors

5 ® 5 Bottom Conditions

6 ® 6 What do you need? Many boaters carry several anchors of different sizes and types Many boaters carry several anchors of different sizes and types

7 ® 7 Fluke Type Anchors

8 ® 8 Claw Type Anchors

9 ® 9 Plow Type Anchors

10 ® 10 Mushroom Anchors Mooring Mooring Dinghy anchor

11 ® 11 Grapnel closed open

12 ® 12 Anchor Storage

13 ® 13 Anchor Rode Rode is the entire length of anchor line or chain between the boat and the anchor Rode is the entire length of anchor line or chain between the boat and the anchor

14 ® 14 Nylon vs. Chain Nylon (et al) Nylon (et al) Less costly Less costly Lighter in weight Lighter in weight 20% or greater stretch 20% or greater stretch Shock absorber Shock absorber Easier to work with Easier to work with Heat stress failure Heat stress failure Wear and abrasion Wear and abrasion Some UV damage Some UV damage Chain Chain Expensive Heavy and heavier Rugged Resists wear and abrasion Deep catenary Holds bottom Does not stretch Non-absorbing May need a hoist May bow down trim the boat Corrosion potential Gloves

15 ® 15 Anchor Chain Strength and weight differences Strength and weight differences Link Size Safe Working Load (lb) Breaking Strength (lb) Weight per 10 ft (lbs) Proof Coil 3/ ¼ / ‫⅜‫⅜‫⅜‫⅜ ½ ⅝ / BBB 5/ / /

16 ® 16 Correct Anchor Size & Weight Check your manufacture’s recommendations Check your manufacture’s recommendations Under what conditions will the anchor be used? Under what conditions will the anchor be used? Storm anchors – increase the weight and size of rode. Storm anchors – increase the weight and size of rode. Boat Length ChainRope Fluke Type Plow Type Claw Type (ft) Size (in) Galvanized High tensile AluminumHingedNon-hinged Up to 25 ¼3/8 8 lb 6 lb 4 lb 25 lb 9 lb 11 lb ¼½ 15 lb 14 lb 7 lb 35 lb 14 lb 16.5 lb /165/8 22 lb 25 lb 10 lb 35 lb 22 lb 22– 33 lb /8¾ 43 lb 40 lb 15 lb 45 lb 35 lb 44 lb /21 70 lb 21 lb 60 lb 66 lb

17 ® 17 How much Chain and Line? Typical anchor system Typical anchor system Chain at anchor Line to boat

18 ® 18 Scope – Line/Chain

19 ® 19 Scope >>

20 ® 20 Scope Line/Chain combo Line/Chain combo 7:1 nominal 7:1 nominal 10:1storm 10:1storm 5:1light conditions 5:1light conditions All Chain All Chain 3:1 – 5:1 3:1 – 5:1

21 ® 21 Why Chain? Prevents chafe on bottom Prevents chafe on bottom Hold anchor stock horizontal Hold anchor stock horizontal Enhances catenary Enhances catenary How long? How long? 1/2 to full length of boat for combo 1/2 to full length of boat for combo More is better More is better

22 ® 22 Catenary - Line Natural catenary – provides cushion Natural catenary – provides cushion Straightens under wind and wave conditions Straightens under wind and wave conditions

23 ® 23 Catenary - Chain Chain contours bottom Chain contours bottom Peels from bottom under wind and wave conditions Peels from bottom under wind and wave conditions

24 ® 24 Anchor Sentinel Sentinel – weight deployed on anchor rode Sentinel – weight deployed on anchor rode Alters catenary to flatter position Alters catenary to flatter position Sentinel suspended and held in place by line: “Preventer” (red) Sentinel suspended and held in place by line: “Preventer” (red)

25 ® 25 Snubber Snubber – section of line allowing chain to loop Snubber – section of line allowing chain to loop Serves as a “shock absorber” Serves as a “shock absorber”

26 ® 26 Anchor Windlass Switch Lock

27 ® 27 Shackle, Swivels, Thimble & Hook

28 ® 28 Chafing Gear

29 ® 29 Identifying Anchorages

30 ® 30 No Anchor Warnings No Anchor Areas No Anchor Areas

31 ® 31 Single Anchor

32 ® 32 Lowering the Anchor

33 ® 33 Anchoring >>

34 ® 34 Confirming Hold

35 ® 35 Weighing & Retrieving Anchor

36 ® 36 Retrieving the Anchor >>

37 ® 37 Two Anchors In tight quarters two anchors may be required to control swing In tight quarters two anchors may be required to control swing

38 ® 38 Two Bow Anchors 30° to 45° Scope 7 to 10:1

39 ® 39 Bahamian Mooring In confined space two bow anchors can be used In confined space two bow anchors can be used Plan for your swing room

40 ® 40 Overnight Anchoring Same basic consideration for any anchoring situation Same basic consideration for any anchoring situation

41 ® 41 Fouled Anchor

42 ® 42 Trip Line

43 ® 43 Mooring Approach

44 ® 44 Leaving a Mooring

45 ® 45 Raftup Socialization on the water Socialization on the water Boaters can safely move from boat to boat Boaters can safely move from boat to boat Planning and permission required Planning and permission required

46 ® 46 Fenders

47 ® 47 Side by Side Rafting

48 ® 48 Stern to Stern Rafting

49 ® 49 Rafting in a Circle Good manners and courtesy are important during raftups.

50 ® 50


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