A hull is the watertight body of a ship , boat , submarine , or flying boat . The hull may open at the top (such as a dinghy ), or it may be fully or partially covered with a deck. Atop the deck may be a deckhouse and other superstructures , such as a funnel, derrick, or mast . The line where the hull meets the water surface is called the waterline .
25-479: Royal Clipper is a steel- hulled five- masted fully rigged tall ship used as a cruise ship . She was redesigned by Robert McFarlane of McFarlane ShipDesign, for Star Clippers Ltd. of Sweden , the same designer behind the cruise company's first two vessels. This third one was built using an existing steel hull designed by Zygmunt Choreń that was modified by the Gdańsk Shipyard , where 24 metres (79 ft)
50-526: A crew as small as twenty using powered controls. Royal Clipper cruises the Mediterranean during the summer. During the winter she offers Caribbean trips through the southern parts of the Lesser Antilles area. Because of her size, she can visit smaller ports that larger ( motor ) cruise ships can't reach. Transatlantic crossings are available between seasons. Hull (watercraft) There
75-545: A hull with rounded bilges (the chine creates turbulence and drag resisting the rolling motion, as it moves through the water, the rounded-bilge provides less flow resistance around the turn). In rough seas, this can make the boat roll more, as the motion drags first down, then up, on a chine: round-bilge boats are more seakindly in waves, as a result. Chined hulls may have one of three shapes: Each of these chine hulls has its own unique characteristics and use. The flat-bottom hull has high initial stability but high drag. To counter
100-466: A lower-horsepower engine but will pound more in waves. The deep V form (between 18 and 23 degrees) is only suited to high-powered planing boats. They require more powerful engines to lift the boat onto the plane but give a faster, smoother ride in waves. Displacement chined hulls have more wetted surface area, hence more drag, than an equivalent round-hull form, for any given displacement. Smooth curve hulls are hulls that use, just like
125-435: A seaway) and special considerations for the ship's role, such as the rounded bow of an icebreaker or the flat bottom of a landing craft . In a typical modern steel ship, the hull will have watertight decks, and major transverse members called bulkheads . There may also be intermediate members such as girders , stringers and webs , and minor members called ordinary transverse frames, frames, or longitudinals, depending on
150-399: Is a centerline longitudinal member called a keel . In fiberglass or composite hulls, the structure may resemble wooden or steel vessels to some extent, or be of a monocoque arrangement. In many cases, composite hulls are built by sandwiching thin fiber-reinforced skins over a lightweight but reasonably rigid core of foam, balsa wood, impregnated paper honeycomb, or other material. Perhaps
175-493: Is a wide variety of hull types that are chosen for suitability for different usages, the hull shape being dependent upon the needs of the design. Shapes range from a nearly perfect box in the case of scow barges to a needle-sharp surface of revolution in the case of a racing multihull sailboat. The shape is chosen to strike a balance between cost, hydrostatic considerations (accommodation, load carrying, and stability), hydrodynamics (speed, power requirements, and motion and behavior in
200-423: Is easily unsettled in waves. The multi-chine hull approximates a curved hull form. It has less drag than a flat-bottom boat. Multi chines are more complex to build but produce a more seaworthy hull form. They are usually displacement hulls. V or arc-bottom chine boats have a V shape between 6° and 23°. This is called the deadrise angle. The flatter shape of a 6-degree hull will plane with less wind or
225-620: Is founded along with the world's first known dam. c. 2960 BC: Death of Egyptian First Dynasty pharaoh Semerkhet , whose name marks the first definitive use of a Nebty name . c. 2920 BC: Troy is founded on this date (assuming the interpretation of Manfred Korfmann is followed). c. 2900+ BC Prometheus would have sprouted in this century. Inventions, discoveries, introductions [ edit ] 3000–2000 BC – Hieroglyphic writing in Egypt , potter's wheel in China , first pottery in
250-948: The Americas (in Ecuador ). c. 3000 BC – Sumerians establish cities. c. 3000 BC – Sumerians start to work in various metals. c. 3000 BC – Knowledge of Ancient Near Eastern grains appears in Ancient China . 3000–2000 BC – Settled villages are widespread in Mesoamerica . The shekal was introduced in Mesopotamia as a monetary and weight unit; see ancient weights and measures , Shekel . The Sydney rock engravings date from around 3000 BC ( Sydney , Australia ). Architecture [ edit ] 30th century BC in architecture References [ edit ] ^ POSSEHL, G. L. (2000). "The Early Harappan Phase" . Bulletin of
275-829: The Indus Valley . c. 3000 BC: Camels are domesticated in Egypt. c. 3000 BC: There is an intense phase of burial at Duma na nGiall on the Hill of Tara , the ancient seat of the High King of Ireland . c. 3000 BC: Stonehenge begins to be built. In its first version, it consists of a circular ditch and bank, with 56 wooden posts. c. 3000 BC: Cycladic civilization in the Aegean Sea starts. c. 3000 BC: Helladic period starts. c. 3000 BC: Aegean Bronze Age starts. c. 3000 BC: Austronesian expansion begins. c. 3000 BC: Jawa, Jordan
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#1733093672266300-610: The Yngling and Randmeer . Hull forms are defined as follows: Block measures that define the principal dimensions. They are: Form derivatives that are calculated from the shape and the block measures. They are: Coefficients help compare hull forms as well: Note: C b = C p ⋅ C m {\displaystyle C_{b}=C_{p}\cdot C_{m}} Use of computer-aided design has superseded paper-based methods of ship design that relied on manual calculations and lines drawing. Since
325-516: The structural arrangement . The uppermost continuous deck may be called the "upper deck", "weather deck", "spar deck", " main deck ", or simply "deck". The particular name given depends on the context—the type of ship or boat, the arrangement, or even where it sails. In a typical wooden sailboat, the hull is constructed of wooden planking, supported by transverse frames (often referred to as ribs) and bulkheads, which are further tied together by longitudinal stringers or ceiling. Often but not always there
350-445: The waterline , giving less resistance and more speed. With a greater payload, resistance is greater and speed lower, but the hull's outward bend provides smoother performance in waves. As such, the inverted bell shape is a popular form used with planing hulls. A chined hull does not have a smooth rounded transition between bottom and sides. Instead, its contours are interrupted by sharp angles where predominantly longitudinal panels of
375-4787: The "Currey Tree" " . www.researchgate.net . ^ Staff, A. G. (2016-03-30). "Australia's top 7 Aboriginal rock art sites" . Australian Geographic . Retrieved 2024-08-19 . v t e Decades and years 30th century BC 32nd century BC ← 31st century BC ← ↔ → 29th century BC → 28th century BC 3000s BC 3009 BC 3008 BC 3007 BC 3006 BC 3005 BC 3004 BC 3003 BC 3002 BC 3001 BC 3000 BC 2990s BC 2999 BC 2998 BC 2997 BC 2996 BC 2995 BC 2994 BC 2993 BC 2992 BC 2991 BC 2990 BC 2980s BC 2989 BC 2988 BC 2987 BC 2986 BC 2985 BC 2984 BC 2983 BC 2982 BC 2981 BC 2980 BC 2970s BC 2979 BC 2978 BC 2977 BC 2976 BC 2975 BC 2974 BC 2973 BC 2972 BC 2971 BC 2970 BC 2960s BC 2969 BC 2968 BC 2967 BC 2966 BC 2965 BC 2964 BC 2963 BC 2962 BC 2961 BC 2960 BC 2950s BC 2959 BC 2958 BC 2957 BC 2956 BC 2955 BC 2954 BC 2953 BC 2952 BC 2951 BC 2950 BC 2940s BC 2949 BC 2948 BC 2947 BC 2946 BC 2945 BC 2944 BC 2943 BC 2942 BC 2941 BC 2940 BC 2930s BC 2939 BC 2938 BC 2937 BC 2936 BC 2935 BC 2934 BC 2933 BC 2932 BC 2931 BC 2930 BC 2920s BC 2929 BC 2928 BC 2927 BC 2926 BC 2925 BC 2924 BC 2923 BC 2922 BC 2921 BC 2920 BC 2910s BC 2919 BC 2918 BC 2917 BC 2916 BC 2915 BC 2914 BC 2913 BC 2912 BC 2911 BC 2910 BC 2900s BC 2909 BC 2908 BC 2907 BC 2906 BC 2905 BC 2904 BC 2903 BC 2902 BC 2901 BC 2900 BC 2890s BC 2899 BC 2898 BC 2897 BC 2896 BC 2895 BC 2894 BC 2893 BC 2892 BC 2891 BC 2890 BC v t e Centuries and millennia Millennium Century BC (BCE) 4th 40th 39th 38th 37th 36th 35th 34th 33rd 32nd 31st 3rd 30th 29th 28th 27th 26th 25th 24th 23rd 22nd 21st 2nd 20th 19th 18th 17th 16th 15th 14th 13th 12th 11th 1st 10th 9th 8th 7th 6th 5th 4th 3rd 2nd 1st AD (CE) 1st 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 2nd 11th 12th 13th 14th 15th 16th 17th 18th 19th 20th 3rd 21st 22nd 23rd 24th 25th 26th 27th 28th 29th 30th Retrieved from " https://en.wikipedia.org/w/index.php?title=30th_century_BC&oldid=1241106615 " Categories : 30th century BC 3rd millennium BC Centuries Hidden categories: CS1: long volume value Articles with short description Short description
400-912: The Deccan College Research Institute . 60/61: 227–241. ISSN 0045-9801 . JSTOR 42936617 . ^ Memory and Monuments at the Hill of Tara by Erin McDonald, Chronika Journal ^ National Geographic , June 2008 ^ "Bronze Age Aegean" . World History Encyclopedia . Retrieved 2022-05-25 . ^ Guild, History (2021-03-12). "What is the Austronesian Expansion?" . History Guild . Retrieved 2022-05-25 . ^ "A History of Dams: From Ancient Times to Today" . Tata & Howard . 2016-05-17 . Retrieved 2022-05-25 . ^ Salzer, Matthew; Baisan, Christopher H. "Dendrochronology of
425-513: The curved hulls, a centreboard, or an attached keel. Semi round bilge hulls are somewhat less round. The advantage of the semi-round is that it is a nice middle between the S-bottom and chined hull. Typical examples of a semi-round bilge hull can be found in the Centaur and Laser sailing dinghies . S-bottom hulls are sailing boat hulls with a midships transverse half-section shaped like an s . In
450-479: The earliest proper hulls were built by the Ancient Egyptians , who by 3000 BC knew how to assemble wooden planks into a hull. Hulls come in many varieties and can have composite shape, (e.g., a fine entry forward and inverted bell shape aft), but are grouped primarily as follows: At present, the most widely used form is the round bilge hull. With a small payload, such a craft has less of its hull below
475-1709: The early 1990s, a variety of commercial and freeware software packages specialized for naval architecture have been developed that provide 3D drafting capabilities combined with calculation modules for hydrostatics and hydrodynamics. These may be referred to as geometric modeling systems for naval architecture. 30th century BC One hundred years, from 3000 BC to 2901 BC [REDACTED] This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed. Find sources: "30th century BC" – news · newspapers · books · scholar · JSTOR ( December 2009 ) ( Learn how and when to remove this message ) Millennium 3rd millennium BC Centuries 31st century BC 30th century BC 29th century BC Timelines 31st century BC 30th century BC 29th century BC State leaders 31st century BC 30th century BC 29th century BC Decades 2990s BC 2980s BC 2970s BC 2960s BC 2950s BC 2940s BC 2930s BC 2920s BC 2910s BC 2900s BC Categories: Births – Deaths Establishments – Disestablishments v t e The 30th century BC
500-412: The high drag, hull forms are narrow and sometimes severely tapered at bow and stern. This leads to poor stability when heeled in a sailboat. This is often countered by using heavy interior ballast on sailing versions. They are best suited to sheltered inshore waters. Early racing power boats were fine forward and flat aft. This produced maximum lift and a smooth, fast ride in flat water, but this hull form
525-417: The hull meet. The sharper the intersection (the more acute the angle), the "harder" the chine. More than one chine per side is possible. The Cajun "pirogue" is an example of a craft with hard chines. Benefits of this type of hull include potentially lower production cost and a (usually) fairly flat bottom, making the boat faster at planing . A hard chined hull resists rolling (in smooth water) more than does
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#1733093672266550-487: The s-bottom, the hull has round bilges and merges smoothly with the keel, and there are no sharp corners on the hull sides between the keel centreline and the sheer line. Boats with this hull form may have a long fixed deep keel, or a long shallow fixed keel with a centreboard swing keel inside. Ballast may be internal, external, or a combination. This hull form was most popular in the late 19th and early to mid 20th centuries. Examples of small sailboats that use this s-shape are
575-480: The ship's Mediterranean interior. Her design was based on Preussen , a famous German five-mast Flying P-Liner windjammer built in 1902. Star Clippers claims that she is the largest "true sailing ship" built since Preussen . She is listed in Guinness World Records as the largest square-rigged ship in service, with 5,202 square metres (55,990 sq ft) of sail. Her sails can be handled with
600-762: Was a century that lasted from the year 3000 BC to 2901 BC. Events [ edit ] [REDACTED] Stele bearing the name of Djet Before 3000 BC: An image of a deity (detail from a cong ) recovered from Tomb 12 in Fanshan, Yuyao , Zhejiang , is made during the Neolithic period by the Liangzhu culture . It is now kept at Zhejiang Provincial Museum , Hangzhou . c. 3000 BC: Earliest remains from Aniba (Nubia) . c. 3000 BC: Early agriculture in North Africa . c. 3300 BC – 2600 BC: Early Harappan period continues in
625-513: Was added to its length. Originally built by Polish communist authorities as "Gwarek" she was intended as a floating vacation home for miners . She was sold because of financial problems. The Merwede shipyard completed the ship's interior in July 2000, whilst visiting the Pool of London , for its pre-launch to the travel industry. The renovations included frescography murals by Rainer Maria Latzke completing
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