Hunter 41 DS
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Hunter 41 DS
The Hunter 41 is an American sailboat that was designed by Glenn Henderson as a cruiser and first built in 2004. Production The design was built by Hunter Marine in the United States between 2004 and 2012, but it is now out of production. The design was built in two variants, the Aft Cockpit (AC) and the Deck Salon (DS) models. Design Henderson explained the design goals, "I wanted a boat that would have all the systems and conveniences you'd expect in a house and also be capable of long-distance offshore passages." The Hunter 41 is a recreational keelboat, built predominantly of fiberglass. It has a fractional sloop B&R rig, a nearly plumb stem, a walk-through reverse transom with a swimming platform and folding ladder, an internally mounted spade-type rudder controlled by a wheel and a fixed deep fin keel or optional wing keel. It displaces and carries of ballast with the deep keel, with the wing keel. The boat has a draft of with the standard deep keel and with t ...
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Glenn Henderson
Glenn may refer to: Name or surname * Glenn (name) * John Glenn, U.S. astronaut Cultivars * Glenn (mango) * a 6-row barley variety Places In the United States: * Glenn, California * Glenn County, California * Glenn, Georgia, a settlement in Heard County * Glenn, Illinois * Glenn, Michigan * Glenn, Missouri * Glenn Highway in Alaska Organizations *Glenn Research Center, a NASA center in Cleveland, Ohio See also * New Glenn, a heavy-lift orbital launch vehicle * * *Glen, a valley *Glen (other) A glen is a valley. Glen may also refer to: People * Glen (given name) * Glen (surname) Places * River Glen (other) or Glen River, in various countries Ireland * Glen, Ballyloughloe, a townland in Ballyloughloe civil parish, County We ...
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Plumb Stem
The stem is the most forward part of a boat or ship's bow and is an extension of the keel itself. It is often found on wooden boats or ships, but not exclusively. Description The stem is the curved edge stretching from the keel below, up to the gunwale of the boat. It is part of the physical structure of a wooden boat or ship that gives it strength at the critical section of the structure, bringing together the port and starboard side planks of the hull. Plumb and raked stem There are two styles of stems: ''plumb'' and ''raked''. When the stem comes up from the water, if it is perpendicular to the waterline it is "plumb". If it is inclined at an angle to the waterline it is "raked". (For example, "The hull is single decked and characterized by a plumb stem, full bows, straight keel, moderate deadrise, and an easy turn of bilge.") Stemhead Because the stem is very sturdy, the top end of it may have something attached, either ornamental or functional in nature. On smalle ...
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Head (watercraft)
In sailing vessels, the head is the ship's toilet. The name derives from sailing ships in which the toilet area for the regular sailors was placed at the head or bow of the vessel. Design In sailing ships, the toilet was placed in the bow somewhat above the water line with vents or slots cut near the floor level allowing normal wave action to wash out the facility. Only the captain had a private toilet near his quarters, at the stern of the ship in the quarter gallery. The plans of 18th-century naval ships do not reveal the construction of toilet facilities when the ships were first built. The Journal of Aaron Thomas aboard HMS ''Lapwing'' in the Caribbean Sea in the 1790s records that a canvas tube was attached, presumably by the ship's sailmaker, to a superstructure beside the bowsprit near the figurehead, ending just above the normal waterline. In many modern boats, the heads look similar to seated flush toilets but use a system of valves and pumps that brings sea water ...
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Laminate
Simulated flight (using image stack created by μCT scanning) through the length of a knitting needle that consists of laminated wooden layers: the layers can be differentiated by the change of direction of the wood's vessels Shattered windshield lamination keeps shards in place Laminate flooring A flexible thin-film solar cell for aerospace use (2007) Lamination is the technique/process of manufacturing a material in multiple layers, so that the composite material achieves improved strength, stability, sound insulation, appearance, or other properties from the use of the differing materials, such as plastic. A laminate is a layered object or material assembled using heat, pressure, welding, or adhesives. Various coating machines, machine presses and calendering equipment are used. Lamination may be applied to textiles, glass, wood, or other materials. Laminating paper in plastic makes it sturdy, waterproof, and erasable. Laminating metals and electronic components ...
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Anchor
An anchor is a device, normally made of metal, used to secure a vessel to the bed of a body of water to prevent the craft from drifting due to wind or current. The word derives from Latin ', which itself comes from the Greek (). Anchors can either be temporary or permanent. Permanent anchors are used in the creation of a mooring, and are rarely moved; a specialist service is normally needed to move or maintain them. Vessels carry one or more temporary anchors, which may be of different designs and weights. A sea anchor is a drag device, not in contact with the seabed, used to minimize drift of a vessel relative to the water. A drogue is a drag device used to slow or help steer a vessel running before a storm in a following or overtaking sea, or when crossing a bar in a breaking sea. Anchoring Anchors achieve holding power either by "hooking" into the seabed, or weight, or a combination of the two. The weight of the anchor chain can be more than that of ...
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CD Player
A CD player is an electronic device that plays audio compact discs, which are a digital audio, digital optical disc data storage format. CD players were first sold to consumers in 1982. CDs typically contain recordings of audio material such as music or audiobooks. CD players may be part of home stereo systems, car audio systems, personal computers, or portable CD players such as CD boomboxes. Most CD players produce an output signal via a headphone jack or RCA jacks. To use a CD player in a home stereo system, the user connects an RCA cable from the RCA jacks to a hi-fi (or other power amplifier, amplifier) and loudspeakers for listening to music. To listen to music using a CD player with a headphone output jack, the user plugs headphones or earphones into the headphone jack. Modern units can play audio formats other than the original CD PCM audio coding, such as MP3, Advanced Audio Coding, AAC and Windows Media Audio, WMA. DJs playing dance music at clubs often use specialize ...
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Depth Sounder
Echo sounding or depth sounding is the use of sonar for ranging, normally to determine the depth of water (bathymetry). It involves transmitting acoustic waves into water and recording the time interval between emission and return of a pulse; the resulting time of flight, along with knowledge of the speed of sound in water, allows determining the distance between sonar and target. This information is then typically used for navigation purposes or in order to obtain depths for charting purposes. Echo sounding can also be used for ranging to other targets, such as fish schools. Hydroacoustic assessments have traditionally employed mobile surveys from boats to evaluate fish biomass and spatial distributions. Conversely, fixed-location techniques use stationary transducers to monitor passing fish. The word '' sounding'' is used for all types of depth measurements, including those that don't use sound, and is unrelated in origin to the word ''sound'' in the sense of noise or tone ...
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Knotmeter
Pitometer logs (also known as pit logs) are devices used to measure a ship's speed relative to the water. They are used on both surface ships and submarines. Data from the pitometer log is usually fed directly into the ship's navigation system. History All nautical instruments designed to measure the speed of a ship through water are known as logs. This nomenclature dates back to days of sail when sailors tossed a log attached to rope knotted at regular intervals off the stern of a ship. The sailors would count the number of knots that passed through their hands in a given period of time. Today sailors still use the unit of knots to express a ship's speed. The speed of the ship was needed to navigate the ship using dead reckoning, which was standard practice in the days before modern navigation instruments like GPS. During World War II, pitometer logs were often interfaced directly into warship fire control systems. This interface was necessary to allow gunnery and torpedo fi ...
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Marine VHF Radio
Marine VHF radio is a worldwide system of two way radio transceivers on ships and watercraft used for bidirectional voice communication from ship-to-ship, ship-to-shore (for example with harbormasters), and in certain circumstances ship-to-aircraft. It uses FM channels in the very high frequency (VHF) radio band in the frequency range between 156 and 174 MHz, designated by the International Telecommunication Union as the ''VHF maritime mobile band''. In some countries additional channels are used, such as the L and F channels for leisure and fishing vessels in the Nordic countries (at 155.5–155.825 MHz). Transmitter power is limited to 25 watts, giving them a range of about . Marine VHF radio equipment is installed on all large ships and most seagoing small craft. It is also used, with slightly different regulation, on rivers and lakes. It is used for a wide variety of purposes, including marine navigation and traffic control, summoning rescue services and commun ...
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Genoa (sail)
A genoa sail is a type of large jib or staysail that extends past the mast and so overlaps the main sail when viewed from the side, sometimes eliminating it. It was originally called an "overlapping jib" and later a genoa jib. It is used on single-masted sloops and twin-masted boats such as yawls and ketches. Its larger surface area increases the speed of the craft in light to moderate winds; in high wind, a smaller jib is usually substituted, and downwind a spinnaker may be used. Definition The term ''jib'' is the generic term for any of an assortment of ''headsails''. The term ''genoa'' (or genny) refers to a type of jib that is larger than 100% of the foretriangle, which is the triangular area formed by the point at which the stay intersects the mast (sailing), mast, and deck (ship), deck or bowsprit, and the line where the mast (sailing), mast intersects deck (ship), deck at the rail. Colloquially the term is sometimes used interchangeably with ''jib''. A working jib is no la ...
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Roller Furling
Roller furling is a method of furling (i.e. reefing) a yacht's staysail by rolling the sail around a stay. Roller furling is typically used for foresails such as jibs or genoas. A mainsail may also be furled by a similar system, whereby the sail is furled within the mast or around a rotating boom (or around a rotating shaft within a boom). Although staysail roller-furling is effective and very common, in-mast or in-boom mainsail furling involves some compromises, and mainsail slab reefing gives a better sail shape. Methods The idea for a furling jib is usually attributed to Major E du Boulay in England who invented a device similar to a roller blind for reefing a jib. Major Wykeham-Martin used one of Boulay's rollers and improved the system by incorporating roller bearings in 1907 when the system was patented. The original castings were made by London-based toilet makers Bouldings. Furling systems are commonplace on cruising yachts today. An early version of staysail rolle ...
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Wing Keel
The winged keel is a sailboat keel layout first fitted on the 12-metre class yacht ''Australia II'', 1983 America's Cup winner. Design This layout was adopted by Ben Lexcen, designer of ''Australia II''. Although Ben Lexcen "had tried the winged keel idea before", there is conjecture that it was computed and designed by a Dutch aerodynamicist at the Wageningen towing tank (Netherlands Ship Model Bassin). in May 2024 A detailed article was published by the Journal of Engineering Ethics which came to the conclusion that Lexcen should not have been credited with the invention on the patent application. It also claimed that he had not been involved with the design because he had departed from Holland before the prototype work which evolved the winglets was carried out. Wings The lateral wings of Australia II are of moderate aspect ratio, forming a nearly horizontal foil, the "wing", at the bottom to provide additional effective span, in the same way as the winglets on an aircraft. ...
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