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Sail Survey > Sail Survey Terms > Flashcards

Sail Survey Terms Flashcards

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1
Q

Tensile Strength

A

Tensile strength is a measurement of the force required to pull something such as rope, wire, or a structural beam to the point where it breaks.

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2
Q

Modules of Elasticity

A

the ratio of the stress applied to a body or substance to the resulting strain within the elastic limit. Ratio of stress to strain

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3
Q

Lazzerette

A

A lazarette (also spelled lazaret) is a special area on a boat. It is often an area near or aft of the cockpit.

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4
Q

Chainplates

A

A chainplate is a metal plate used to fasten a shroud or stay to the hull of a sailboat.

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5
Q

Ballast

A

heavy material, such as gravel, sand, iron, or lead, placed low in a vessel to improve its stability.

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6
Q

Rot

A

decay caused by the action of bacteria and fungi; decompose.

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7
Q

Aft

A

at, near, or toward the stern of a ship

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8
Q

Tension

A

tension may be described as the pulling force transmitted axially by the means of a string, cable, chain

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9
Q

Compression

A

the result of the subjection of a material to compressive stress

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10
Q

Torsion

A

the action of twisting or the state of being twisted, especially of one end of an object relative to the other.

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11
Q

Flat Bottom

A

This boat hull is very stable in calm weather. This planing hull has a shallow draft, which is good for fishing in small lakes and rivers.

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12
Q

Round Bottom

A

This hull is rounded to allow the boat to travel through water easily at slower speeds to limit the amount of drag on the boat.

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13
Q

V Bottom

A

This fishing boat is easier to maneuver at slow speeds, the Deep-Vee design offers a good ride in rough water as the pointed bow slices forward and the “V” shaped. This planing hull has a shallow draft, which is good for fishing in small lakes and rivers.

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14
Q

LOL Lenght Overall

A

It’s a measurement that is supposed to be done from the foremost part of the boat to the aftermost, taking in anything that is a permanent part of the structure.

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15
Q

Beam

A

its width at the widest point as measured at the ship’s nominal waterline.

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16
Q

LWL Lenght of Water Line

A

The waterline length (originally Load Waterline Length, abbreviated to LWL) is the length of a ship or boat at the point where it sits in the water.

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17
Q

Draft

A

The distance from the surface of the water to the ship’s keel (how deep the ship is into the water).

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18
Q

Athwartships

A

Across the ship, at right angles to the centreline.

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19
Q

Stem

A

The upright post or bar of the bow.

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20
Q

Stern

A

The after part of the vessel.

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21
Q

Pulpit

A

The railing at the bow of a boat, which sometimes extends past the deck. It is sometimes referred to as bow pulpit.

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22
Q

Pushpit

A

The railing at the sternof a boat, Taffrail

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23
Q

Coaming

A

A part of the frame of a deck hatch or cabin trunk which is raised above deck level to keep out water. 2) A raised partition around the cockpit of small sailboats which keeps water from entering the cockpit well.

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24
Q

Keel

A

The central longitudinal structural member of a ship to which all the frames, stem and sternpost are fastened.

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25
Q

Chine

A

The edge formed on the hull of a flat bottomed or V-bottomed boat where the bottom joins the topsides.

26
Q

Topsides

A

The visible outside of the hull. The outside face of the hull between the water and the deck.

27
Q

Forefoot

A

The area of a ship’s hull where the keel and stem are joined.

28
Q

Cabinhouse

A

The captain’s quarters. The enclosed space of decked-over small boat.

29
Q

Sheer

A

The curved fore and aft line formed by the uppermost plank of a boat.

30
Q

Shear

A

A hoisting rig for unshipping a mast employing two spars joined at the top from which the tackle is suspended. From the term shears, meaning like scissors.

31
Q

Flare

A

A bow with an extreme flare at the upper and forcastle deck.

32
Q

Waterline

A

The plane where a normally laden boat hull lies at the water’s surface.

33
Q

Depth

A

1) The vertical distance from the surface to the bottom of a body of water. 2) One of the admeasurement of a ship, indicating the interior distance from the upper deck to the deepest part of the bilge.

34
Q

Breadth

A

The transverse measurement of a boat at its widest point. Also called breadth. (2) One of the transverse members of a ship’s frames on which the decks are laid.

35
Q

Free Board

A

The vertical distance between the water and the gunwale of a boat; as in: “She doesn’t have enough freeboard for a sea boat.”

36
Q

Deadrise

A

The height of the waterline above and away from the level of the keel expressed in inches per footDescribing the underwater shape of a V bottom or round bottom boat.

37
Q

Displacement

A

The weight of a mass of water pushed aside by the intrusion of a ship’s hull.

38
Q

Wetted Surface

A

The underwater area of a vessel, used by designers to calculate hydraulic effects on capability and speed.

39
Q

Longitudinal Stiffeners

A

Supports installed to provied rigity to reduce the possibility of oil caning

40
Q

Intercostals

A

Short pieces between the frames,Plates which fit between floors to stiffen the double bottom of a ship. Intercostal comes from the Latin words inter, meaning between, and costa, meaning rib.

41
Q

Engine Girders

A

engines up to 400kW are to be mounted on longitudinal bottom girders. The frames just “up front and beyond” the engine have to be web frames, stronger than regular transverse frames

42
Q

Bulkheads

A

(1) A vertical structural partition dividing a vessel’s interior into various compartments for strength and safety purposes; (termed strength bulkhead). (2) Term applied to vertical partition walls (non-structural) subdividing the interior of a vessel into compartments.

43
Q

Spars

A

The general term for any of the abovedeck timbers to which sails are bent, such as the masts, booms, gaffs yards and sprits.

44
Q

Turn of the Bilge

A

The part of the bottom of a ship where the relatively flat shape begins curving up to form the topsides.

45
Q

Bilge

A

The deepest part inboard of a ship’s hull, where any leakage collects.

46
Q

Transom

A

The flat outboard stern structure of a ship from keel to deck.

47
Q

Quarter

A

The stern part of a vessel on either side of the rudder.

48
Q

Counter

A

1) The overhanging stern portion of the hull of a vessel. The outboard stern portion of the hull between the waterline and the rail, especially as it applies to the lines of the vessel

49
Q

Dead Rise

A

The upward slope of a ship’s bottom from the keel to the bilge. This rise is to give drainage of oil or water toward the center of the ship.

50
Q

Center Board

A

A heavy retractable fin extending through the bottom of a small sailboat to provide stability, reduce leeway and improve the efficiency of the sail. A movable keel.

51
Q

Dagger Board

A

A centerboard in very small sailboats which is emplaced or removed vertically through a well or trunk.

52
Q

Helm Station

A

a positon where the bost is helmed , steerage is controled

53
Q

Tiller

A

A long hand lever attached to the top of the rudder, used to steer the vessel. The term is derived from the handle of a plow used to till the soil.

54
Q

Topside

A

Deck part of the boat

55
Q

Superstructure

A

In ships this is the name given to the part of the ship that emerges from the deck.

56
Q

Sea Cock

A

A safety valve mounted inboard of a through hull fitting. If a pipe from a through hull fitting begins leaking, the sea cock can be closed to prevent flooding while repairs are made.

57
Q

Abaft

A

Toward the stern, as in: In a yawl rig, the mizzen is stepped abaft the rudder post.

58
Q

Flair

A

The spreading out from the central vertical plane of the body of a ship with increasing rapidity as the section rises from the waterline to the rail.

59
Q

Forestay

A

The cable or line in the standing rigging which runs from the head of the foremost mast to the foredeck at the bow.

60
Q

Backstay

A

A wire or rope support extending from the masthead aft and fastening to chain plates abaft the step or at the stern

Sail Survey (3 decks)

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