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Welcome to AUXSEA

Welcome to AUXSEA. House Keeping Items AUXOP Introduction Course format Recording and Posting of Presentation Questions before we begin?. Introduction . The term SEAMANSHIP literally encompasses the entire subject of boating.

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Welcome to AUXSEA

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  1. Welcome to AUXSEA House Keeping Items • AUXOP Introduction • Course format • Recording and Posting of Presentation • Questions before we begin?

  2. Introduction • The term SEAMANSHIP literally encompasses the entire subject of boating. • Reference text: any version of “Chapman’s Seamanship”. • Text: P16794.41 115 Apr 1992 • Final examination based on study questions at end of each chapter in study guide.

  3. TERMINOLOGY starboard gunwale bow/forward cleat port Stern/aft transom

  4. TERMINOLOGY • BOW: The most foward portion of the main hull (the “pointy end”). • FOWARD: Towards (in the direction of) the Bow. • AHEAD: Hull motion relative to the bow. • STERN: Aftermost portion of the main hull; the back end of the vessel (the BLUNT end),

  5. TERMINOLOGY • AFT: In the direction of the stern; towards the back end of the boat. • ASTERN: Direction of hull motion relative to the stern; backing motion relative to the bow. • SIDES: Looking towards the bow, from the stern (on either side of the keel): Side to your right is STARBOARD. Side to your left is PORT

  6. TERMINOLOGY • BEAM: The widest point of the hull, gunwale to gunwale. • ATHWARTSHIP: Any measurement made from one side of the hull to the other at 90 degrees to the keel. • SHEER: The curve or sweep of the deck, from bow to stern, of a vessel when viewed from the side • FLARE: The outward curvature of the sides of the boat near the bow (looking head-on), which helps to keep the vessel’s decks drier.

  7. TERMINOLOGY • Sheer • Flare

  8. flat bottom vee bottom round bottom multi-hull HULL BOTTOMS

  9. Hull Types • Displacement - Displacement of water = weight of boat • Sailboats, trawlers • Planing • Rise over bow wave and glide on water • High speed • PWC, runabouts, small cruisers • Combination • Semi-displacement hulls

  10. Cabin Types TRUNK : Does not extend fully from gunwale to gunwale; has walking space on both sides

  11. Cabin Types RAISED DECK: Does extend all the way, from gunwale to gunwale; NO walking space on either side.

  12. OTHER BOATING TERMS • KEELSON: A timber ( can also be of metal) fastened along the top of the keel, inside of the hull. • LIMBER HOLES: Passages cut into the area next to the keel to allow water to properly flow to it’s lowest point, to be pumped out. • KING POST: The spoke of a steering wheel that is vertical when the rudder is exactly centered along the keel. • THWART: A transverse seat generally in a rowing craft.

  13. OTHER BOATING TERMS • BOOT TOP: The general area of the exterior hull at the waterline. • THWART STANCHION: A vertical support (stanchion) for a transverse seat (thwart).

  14. Motions • PITCH: The “UP” and “DOWN” vertical motion of the bow as the boat rotates around it’s lateral axis. • ROLL: The gunwale–to - gunwale motion of the hull as it rotates around it’s longitudinal axis. • YAW: The swinging motion of the bow from side to side, as the hull rotates around it’s vertical axis. • BROACH: Veer and pitch forward because of bad steering or a sea hitting the stern, causing it to present a side to the wind and sea, losing steerage, and possibly suffer serious damage • CAPSIZING: Vessel rolls over bottom up; difficult or impossible recovery. • PITCHPOLING: Commonly following a BROACH and loss of directional control. Bow plunges deep; turns sharply to one side; vessel rolls and capsizes. Violent potentially lethal maneuver.

  15. Catboat Ketch Sloop Yawl SAILBOAT CONFIGURATION • IDENTIFICATION DEPENDS UPON THE NUMBER OF MASTS AND SAILS AND WHERE PLACED.

  16. CATBOAT CONFIGURATION Mainsail CATBOAT: Single mast; One mainsail Marconi or Gaff

  17. SLOOP CONFIGURATION Mainsail Jib SLOOP: Single mast; mainsail and jib.

  18. KETCH CONFIGURATION STEERING STATION Two masts; smaller aft; after mast ahead of steering station

  19. YAWL CONFIGURATION STEERING STATION Two masts; smallerBEHIND the steering station

  20. SCHOONER CONFIGURATION MAIN Foremast SCHOONER: At least two masts; Main is aft and taller. Foremast is foward. May carry many sails.

  21. BOAT BUILDING MATERIALS Five (5) materials considered • FIBERGLASS • WOOD • STEEL • ALUMINUM • FABRIC

  22. FIBERGLASS • STRANDS OF GLASS, SATURATED WITH RESIN and allowed TO PROPERLY DRY AND CURE Chopped Strands

  23. FIBERGLASS • MOST POPULAR building material • REASON FOR PRIMARY CHOICE: EASE OF MAINTENANCE

  24. TERMINOLOGY Afiberglass hull is composed of matting, roving, cloth and strands of fiberglasssaturated with plastic resin(s); very similar to steel-reinforced concrete.

  25. ADVANTAGES OF FIBERGLASS • IMPERVIOUS TO MARINE ANIMALS, WORMS / BORERS(NOT GROWTH.) • NO DRY ROT • FEW OR NO SEAMS / JOINTS • NO LEAKS FROM SEAMS / JOINTS • COLOR MOLDED IN • STRONG • MOLD INTO ALMOST ANY SHAPE • LOW MAINTENANCE

  26. Disadvantages Of Fiberglass • HEAVIER THAN WATER: READILY SINKS • EASIER TO COVER UP SHODDY WORKMANSHIP

  27. TWO KINDS OF RESINS • POLYESTER: • VERSATILE • EASY TO WORK WITH/ HANDLE • INEXPENSIVE • 2. EPOXIES: • STRONGER • MORE EXPENSIVE • MORE DIFFICULT TO WORK WITH.

  28. RESIN ADDITIVES • Hardeners: HARDEN THE RESIN • Driers: CONTROL THE CURING TIME • Fire Suppressants: MAKE THE RESIN FIRE RETARDANT • ALL RESINS: EXTREMELY FLAMMABLE

  29. MOLDS MALE MOLD: PLUG: Exact size, shape of object to mold FEMALE MOLD: CAVITY MOLD USED FOR HAND-LAYUP CHOPPED STRAND NOTE: Gel Coat applied first, to the inside of the female mold. BLOWGUN PROCESS: Fastest, smoothest results

  30. MOLDS MATCHED DIE: MALE / FEMALE MOLDS CLAMPED TOGETHER LAMINATE USED BETWEEN (SANDWICHED) BALSA WOOD FOAMED PLASTICS PLYWOOD

  31. WOOD CONSIDERATION FOR USE 1. STRENGTH 2. AVAILABILITY 3. WORKABILITY 4. WATER ABSORPTION 5. LEAST NOISY

  32. WOOD CONSTRUCTION MORE DECAY RESISTANT: HARD WOODS: ASH, MAHOGANY, TEAK, OAK LESS DECAY RESISTANT: SOFTER WOODS: CEDAR, FIR, PINE

  33. WOOD DISADVANTAGES • NUMBER ONE: DRY ROT • HIGHLY SUCEPTIBLE TO: WORMS, BORERS • ABSORBS WATER • EASILY DAMAGED

  34. STEEL CONSTRUCTION • DISADVANTAGES • QUICK DETERIORATION • 2. CONSIDERABLE CONTINUOUS MAINTENANCE

  35. STEEL CONSTRUCTION • ADVANTAGES • STRONGEST STRENGTH – TO – WEIGHT RATIO • 2. STIFF \ RESISTANT TO: • IMPACT – FATIGUE - ABRASION • 3. LESS NOISY THAN ALL BUT WOOD

  36. ALUMINUM CONSTRUCTION • ADVANTAGES • 1. LIGHT WEIGHT • 2. IMPERVIOUS TO MARINE ANIMALS • ( NOT GROWTH ) • 3. FAIRLY EASY TO FORM

  37. ALUMINUM CONSTRUCTION • DISADVANTAGES • SUSCEPTIBLE TO ELECTROLYSIS • HEAT CONDUCTOR • 3. NOISY • 4. EASY TO DAMAGE

  38. STEERING SYSTEMS

  39. Drum and Cable Steering 4/2010

  40. Rack & Pinion 4/2010

  41. REVIEW QUESTIONS NO. 1 • A sloop is a sailboat with _______ • ` a. a single mast, with a mainsail and a jib • b. two masts, the aftermast being shorter • than the foreword mast. • c. a single mast rigged to hoist only one sail. • d. two or more masts; the aftermast taller than • the foreword mast.

  42. REVIEW QUESTIONS NO. 2 • A fiberglass hull is constructed of strands and layers of fiberglass ______________ • a. bonded with hydraulic cement. • b. saturated with latex cement. • c. saturated with resin. • d. reinforced with steel mesh.

  43. REVIEW QUESTIONS NO. 3 3. On a strength-to-weight ratio, sheet steel is_________________ a. stronger than fiberglass b. equal to wood c. weaker than aluminum d. equal to fiberglass

  44. REVIEW QUESTIONS NO. 4 4. Steel boat hulls___________________ a. require considerable maintenance b. require no protective painting for growths c. have a higher strength-to-weight ratio than wood and aluminum but not fiberglass. d. are less noisy than all other boat building materials.

  45. REVIEW QUESTIONS NO. 5 5. The simplest type of steering mechanism for a boat is the____________________ a. rack and pinion b. drum and cable c. sprocket and chain d. tiller

  46. REVIEW QUESTIONS NO. 6 6. Limber holes____________________ a. permit water to pass through a boat’s frame. b. provide finger holds for lifting floor boards. c. provide ventilation in holds. d. are used to inspect the bilges.

  47. REVIEW QUESTIONS NO. 7 7. The curve or sweep of a vessel, as viewed from the side is called the ______ a. freeboard b boot top c. sheer d. tumblehome

  48. REVIEW QUESTIONS NO. 8 8. The outward curvature of the sides of the hull, near the bow, that is used to keep the deck drier, is called the_________________ a. sheer b. freeboard c. trunk d. flare

  49. REVIEW QUESTIONS NO. 9 9. The use of two or more different materials, when constructing the hull, is called_____construction. a. layered b. multiple c. composite d. feathered

  50. REVIEW QUESTIONS NO. 10 10. The top advantage of a steel hull is_______ a. it’s weight b. it is quieter c. it is easier to maintain d. it is fire proof

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