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Welcome to AUXSEA House Keeping Items 1.AUXOP Introduction 2.Course format 3.Recording and Posting of Presentation 4.Questions before we begin?
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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.
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TERMINOLOGY bow/forward starboard gunwale cleatportStern/aft transom
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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),
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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
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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.
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TERMINOLOGY Sheer Flare
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HULL BOTTOMS flat bottom multi-hullround bottom vee bottom
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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
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Cabin Types TRUNK : Does not extend fully from gunwale to gunwale; has walking space on both sides
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Cabin Types RAISED DECK: Does extend all the way, from gunwale to gunwale; NO walking space on either side.
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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.
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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).
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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.
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SAILBOAT CONFIGURATION IDENTIFICATION DEPENDS UPON THE NUMBER OF MASTS AND SAILS AND WHERE PLACED. Yawl Sloop Ketch Catboat
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Mainsail CATBOAT CONFIGURATION CATBOAT: Single mast; One mainsail Marconi or Gaff
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SLOOP: Single mast; mainsail and jib. MainsailJib SLOOP CONFIGURATION
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Two masts; smaller aft; after mast ahead of steering station STEERING STATION KETCH CONFIGURATION
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YAWL CONFIGURATION Two masts; smaller BEHIND the steering station STEERING STATION
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SCHOONER: At least two masts; Main is aft and taller. Foremast is foward. May carry many sails. Foremast MAIN SCHOONER CONFIGURATION
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BOAT BUILDING MATERIALS Five (5) materials considered FIBERGLASS WOOD STEEL ALUMINUM FABRIC
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FIBERGLASS STRANDS OF GLASS, SATURATED WITH RESIN and allowed TO PROPERLY DRY AND CURE Chopped Strands
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FIBERGLASS MOST POPULAR building material REASON FOR PRIMARY CHOICE: EASE OF MAINTENANCE
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TERMINOLOGY A fiberglass hull is composed of matting, roving, cloth and strands of fiberglass saturated with plastic resin(s); very similar to steel-reinforced concrete.
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ADVANTAGES OF FIBERGLASS IMPERVIOUS TO MARINE ANIMALS, WORMS / BORERS (NOT GROWTH.) 1.NO DRY ROT 2.FEW OR NO SEAMS / JOINTS 3.NO LEAKS FROM SEAMS / JOINTS 4.COLOR MOLDED IN 5.STRONG 6.MOLD INTO ALMOST ANY SHAPE 7.LOW MAINTENANCE
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Disadvantages Of Fiberglass 1.HEAVIER THAN WATER: READILY SINKS 2.EASIER TO COVER UP SHODDY WORKMANSHIP
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TWO KINDS OF RESINS 1.POLYESTER: VERSATILE EASY TO WORK WITH/ HANDLE INEXPENSIVE 2. EPOXIES: STRONGER MORE EXPENSIVE MORE DIFFICULT TO WORK WITH.
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RESIN ADDITIVES 1.Hardeners: HARDEN THE RESIN 2.Driers: CONTROL THE CURING TIME 3.Fire Suppressants: MAKE THE RESIN FIRE RETARDANT 4.ALL RESINS: EXTREMELY FLAMMABLE
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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
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MOLDS MATCHED DIE: MALE / FEMALE MOLDS CLAMPED TOGETHER LAMINATE USED BETWEEN (SANDWICHED) BALSA WOOD FOAMED PLASTICS PLYWOOD
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WOOD CONSIDERATION FOR USE 1. STRENGTH 2. AVAILABILITY 3. WORKABILITY 4. WATER ABSORPTION 5. LEAST NOISY
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WOOD CONSTRUCTION MORE DECAY RESISTANT: HARD WOODS: ASH, MAHOGANY, TEAK, OAK LESS DECAY RESISTANT: SOFTER WOODS: CEDAR, FIR, PINE
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WOOD DISADVANTAGES 1.NUMBER ONE: DRY ROT 2.HIGHLY SUCEPTIBLE TO: WORMS, BORERS 3.ABSORBS WATER 4.EASILY DAMAGED
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STEEL CONSTRUCTION DISADVANTAGES 1.QUICK DETERIORATION 2. CONSIDERABLE CONTINUOUS MAINTENANCE
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STEEL CONSTRUCTION ADVANTAGES 1.STRONGEST STRENGTH – TO – WEIGHT RATIO 2. STIFF \ RESISTANT TO: IMPACT – FATIGUE - ABRASION 3. LESS NOISY THAN ALL BUT WOOD
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ALUMINUM CONSTRUCTION ADVANTAGES 1. LIGHT WEIGHT 2. IMPERVIOUS TO MARINE ANIMALS ( NOT GROWTH ) 3. FAIRLY EASY TO FORM
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ALUMINUM CONSTRUCTION DISADVANTAGES 1.SUSCEPTIBLE TO ELECTROLYSIS 2.HEAT CONDUCTOR 3. NOISY 4. EASY TO DAMAGE
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STEERING SYSTEMS
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Drum and Cable Steering 4/2010
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Rack & Pinion 4/2010
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REVIEW QUESTIONS NO. 1 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.
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REVIEW QUESTIONS 1. A sloop is a sailboat with________ a. a single mast with a mainsail and jib
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REVIEW QUESTIONS NO. 2 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.
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REVIEW QUESTIONS 2. A fiberglass hull is constructed of strands and layers of fiberglass ________________ c. saturated with resin
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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
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REVIEW QUESTIONS 3. On a strength-to-weight ratio, sheet steel is ____________________ a. stronger than fiberglass
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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.
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REVIEW QUESTIONS 4. Steel boat hulls ___________________ a. require considerable maintenance
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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
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REVIEW QUESTIONS 5. The simplest type of steering mechanism for a boat is the ________________________ d. tiller
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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.
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REVIEW QUESTIONS 6. Limber Holes ________________ a. permit water to pass through a boat’s frame
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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. tumble home
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REVIEW QUESTIONS 7. The curve or sweep of a vessel, as viewed from the side, is called the ____ c. sheer
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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
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REVIEW QUESTIONS 8. The outward curvature of the sides of the hull near the bow, that is used to keep the deck drier, is called the________________ d. flare
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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
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REVIEW QUESTIONS 9. The use of two or more different materials, when constructing the hull, is called _____ construction. c. composite
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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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REVIEW QUESTIONS 10. The top advantage of a steel hull is____ b. it is quieter
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