Horizontal Stabilizer
An airfoil-shaped surface that's mounted above the rear of the hull.
Hull ...
horizon - Where the water and sky or ground and sky appear to intersect.
horseshoe buoy - A floatation device shaped like a U and thrown to people in the water in emergencies.
horizontal lines - The curved lines on the Half breadth Plan which show the water lines, the plane of each section being parallel to the horizon.
Horizontal positioning and spacing of lights
(a) When two masthead lights are prescribed for a power-driven vessel, ...
[edit] Horizontal vs Vertical
Technically speaking, the term "windlass" refers only to horizontal winches. Vertical designs are correctly called capstans.
DECK- Horizontal topmost floor of the vessel.
DEPTH SOUNDER- Instrument that uses sound waves to measure the distance of the bottom.
DINGHY- A small open boat. A dinghy is often used as a tender for a larger craft.
horizontally and placed on its bed, where it is secured by chains passing over a rod fitted with a lever for "letting go." The cat davit is hinged at its base, and can be laid flat on the deck for right ahead fire or when at sea.
horizontal cross-sections that have narrow, usually pointed, fronts (at the bow), smooth widening from the bow until roughly the middle of the length (midships), and often narrowing smoothly but usually significantly to the extreme end (the stern), ...
Horizontal direction of an object from an observer, expressed as an angle from a reference direction (e.g., compass bearing, true bearing, relative bearing).
Beating
To sail upwind, close hauled.
Horizontal water movement caused by the tides rather than by the wind (wind-driven current).
Horizontal members attached to the mast acting as spreaders for the shrouds
cruise
Pleasure trip on a yacht or ship ...
The horizontal movement of water. In many races the current plays a significant role in the progress of the fleet, with navigators playing particular attention to the strength of the current (sometimes as much as 3 to 4 knots) and its position.
D ...
the horizontal spar which the foot of a sail is attached to
Boom Vang
a line that adjusts downward tension on the boom ...
The horizontal movement of water.
Danger Zone
The area encompassed from dead ahead of your boat to just abaft your starboard beam. You must stand clear of any boat in the "danger zone".
Two horizontal pieces of timber or metal on each side of a mast that spread the upper shrouds, helping to support the mast. (back)
cutwater
D (to top) ...
The horizontal distance between two successive wave crests.
Wave period
The time taken for two wave crests to pass a fixed point.
Deck: Horizontal surface or platform of a yacht.
Delaminating: A failure of the bond between either of the hull's outer and inner skins, ...
Current - Horizontal movement on water
Current - Tidal current, ocean current, leeway, minor steering errors
Current Arrow - A line drawn the distance the current travels in one hour from a fixed position on the chart ...
Tier
A horizontal division of a vessel from bottom to top. The numbers run from bottom to deck and from deck upwards and are used as a part of the indication of a stowage place for containers.
Crosstrees - Horizontal members attached to the mast acting as spreaders for the shrouds
Cuddy - A small shelter cabin in a boat.
Bearing - The horizontal direction of an object with respect to an observer or the compass; a determination of position.
CURRENT - The horizontal movement of water.
D
DAYBEACON - A fixed navigation aid structure used in shallow waters upon which is placed one or more daymarks.
horizon glass: on a sextant, the glass or lens through which the horizon is observed. The half of the glass nearer to the sextant frame is a mirror, the other half is clear.
yardarm - The horizontal booms which hold the square sails out crosswise from the foremast ...
Ratlines Horizontal ropes as steps affixed to the shrouds to facilitate climbing.
Reach The course of a sailing vessel between being sailed close hauled and running.
ALL ROUND LIGHT: A navigation light on a pleasure craft showing an unbroken light over an arc of the horizon of 360 degrees.
ALOFT: Above the deck of the boat.
AMIDSHIPS: In or toward the centre of the boat.
A capstan rotates around a vertical axis, as opposed to a windlass, which revolves around a horizontal axis.
Captain - The person who is in charge of a vessel and legally responsible for it and its occupants.
SHAFT ANGLE The angle between the center line of the shaft and the center line of the ship is the horizontal angle and the angle between the center line of the shaft and either the base line or the designed waterline is the vertical angle.
Position is determined by measuring the apparent altitude of one of these objects above the horizon using a sextant and recording the times of these sightings with an accurate clock.
"All-round light" shall mean a light showing an unbroken light over an arc of the horizon of 360 degrees.
BOOM The pivoting horizontal "pole" attached to the aft side of the mast to control the foot of the sail. BOOMKIN A spar projecting from the stern to which is attached a backstay or sheet.
Anti-ventilation plate - The horizontal plate just above the prop
(Sometimes called the anti-cavitation plate )
Amidships - near the middle of a boat.
Aqua-Dynamics- no such word (courtesy of Brian Espy)
Astern - behind the boat; to the rear.
A horizontal athwartship support for the deck.
BEAR OFF - Steer away from the wind, shore or any object.
BEARING - the angular direction in which an object is observed with respect to a reference direction or another object. ...
Reef points: A horizontal line of light lines on a sail which may be tied to the boom, reducing the area of the sail during heavy winds.
Roach The curved portion of a sail extending past a straight line drawn between two corners.
One of a series of competitive boat races in a regatta rail The outer edge of the deck raise To bring an object on the horizon into view rake The inclination sternward of a mast from vertical range When referring to tides, ...
Flag= Blue central horizontal stripe with smaller yellow strip above and under.
When hoisted singly from a ship it means "I am maneuvering with difficulty. (Similar fog signal.)
DD Dry Dock ...
A "masthead light" means a white light placed over the fore and aft centerline of a pleasure craft showing an unbroken light over an arc of the horizon of 225 degrees and so fixed as to show the light from right ahead to 22.
Boom - the horizontal spar to which the foot of a sail is attached.
Boom Crutch Support for the boom, holding it up and out of the way when the boat is anchored or moored. Unlike a gallows frame, a crutch is stowed when boat is sailing.
trimThe way a boat floats in relation to the horizon, bow up, bow down or even. Also, to adjust a boat's horizontal running angle by directing the outboard or stern drive's thrust up or down. Also, to set a sail in correct relation to the wind.
The deck is cored with 1/2-inch end-grain balsa on all of the horizontal surfaces. Smith uses liners extensively, both to save weight and for streamlined production.
Heading - The horizontal direction in which a ship actually points or heads at any instant, expressed in angular units from a reference direction, usually from 000° at the reference direction clockwise through 359°.
(center-U.S. spelling) Centre board: A board that retracts horizontally into a chamber (well) built into the boats hull.
Centre of buoyancy: The centre point of a boats floating ability.
The sextant (named for 1/6 of a circle, or its 60° arc) was designed to determine a ship's position by measuring the angle of elevation between the horizon and a celestial body.
The mariner's compass does not, however, give the true direction of the various points of the horizon.
Crosstrees - horizontal pieces of wood or metal that cross the mast up high, acting as spreaders for the topmast shrouds.
Crow's Nest - protected look-out position high on the foremast
Crutch - A support for a spar when spar is no in use.
The sound pressure level of a directional whistle shall be not more than 4 dB below the prescribed sound pressure level on the axis at any direction in the horizontal plane within ñ 45 degrees of the axis.
The yard is horizontally attached to the mast by its middle.
In the relief to the left you can see an Egyptian sailing ship around 1500 B.C.. It was taken from the death temple of the queen Hadschesput. The square sail is fastened to two yards.
The boom itself was a spar about 21Ú2in (62mm) in diameter and about 12ft (3.7m) long, which when rigged, projected horizontally from the boat's side.
Current is the horizontal motion of the water as it moves in and out with tidal rise and fall. Tides vary around the world from 2 to nearly 50 feet, but depth is not a big issue for a dinghy.
A red and green horizontally striped buoy used in the United States to mark the separation of a channel into two channels. The preferred channel is indicated by the color of the uppermost stripe.
The first step to the treatment of seasickness is to take the crew member to the cockpit and have him look to the horizon. This may relieve the majority of seasick individuals.
Plimsoll mark: a series of horizontal lines, corresponding to the seasons of the year in fresh or saltwater, painted on the outside of a ship marking the level which must remain above the surface of the water for the vessel's stability.
SPAR: Horizontal or vertical poles attached to the vessel for either support of the sails or accessories, etc.
The telltales then stream back horizontally on both sides of the sail, as you can see in this photo.
Hull down - said of a vessel far off on the horizon, which is visible only by its sails. "We spied a ship hull-down this morning, but she came no closer."
Jack Tar - a common sailor. Also simply "Tar." ...
The wooden or metal struts that are attached horizontally to the upper section of the mast, on both sides. They widen the angle of the shrouds, and thus provide a better support for the mast.
Stand-on vessel ...
Ratline: Any of the small ropes that join the shrouds of a ship horizontally and serve as ships for going aloft.
Rigging: The ropes, chains, etc employed to support and work the masts, sails, etc on a ship.
Magnetic Meridian: A line of horizontal magnetic force of the earth to which a compass, in the absence of deviation, aligns itself.
Stay outside as much as possible.
Keep your eyes on the horizon.
Try to keep yourself busy (steering, monitoring sails etc.).
Avoid reading while boat is in motion.
If down below, keep the area well ventilated with fresh air.
The L handle is the valve itself, open when vertical, closed when horizontal. The T handle is a friction lock for the valve. Release the friction (rotate counter-clockwise) before turning the L handle, and tighten again afterwards.
 See also: Boat, Point, Sailing, Deck, Line
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