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Conversely, a boat on an upwind course may find itself trapped in the dirty air of a boat immediately to windward. Right-of-way rules give priority to the leeward boat and can make it advantageous to be the boat without the weather gage, especially just before the start or when the boat to leeward can point higher into the wind.
A multihull is a boat or ship with more than one hull, whereas a vessel with a single hull is a monohull. The most common multihulls are catamarans (with two hulls), and trimarans (with three hulls). There are other types, with four or more hulls, but such examples are very rare and tend to be specialised for particular functions. [1]
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 ...
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A gauge theory is a type of theory in physics.The word gauge means a measurement, a thickness, an in-between distance (as in railroad tracks), or a resulting number of units per certain parameter (a number of loops in an inch of fabric or a number of lead balls in a pound of ammunition). [1]
Royal Navy World War II motor torpedo boat planing at speed on calm water showing its hard chine hull - note how most of the forepart of the boat is out of the water. At rest, a vessel's weight is borne entirely by the buoyant force. Every hull acts as a displacement hull at low speeds: the buoyant force is mainly responsible for supporting the ...
There are also some extreme narrow-gauge railways listed. See: Distinction between a ridable miniature railway and a minimum-gauge railway for clarification. Model railway gauges are covered in rail transport modelling scales. Train with model Southern Railway Schools class Triple-gauge pointwork (3 + 1 ⁄ 2 in, 5 in, and 7 + 1 ⁄ 4 in) on ...
The Nacra 17 was specifically created to meet the criteria laid down for the new olympic discipline, a first for Olympic sailing a mixed crewed boat. In May 2012 International Sailing Federation chose the Nacra 17 as the equipment for the mixed multi hull at the 2016 Olympic Sailing Regatta [ 2 ] and 2020 Summer Olympics in Tokyo.