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The vertical/Z axis, or yaw axis, is an imaginary line running vertically through the ship and through its centre of mass. A yaw motion is a side-to side movement of the bow and stern of the ship. The transverse/Y axis, lateral axis, or pitch axis is an imaginary line running horizontally across the ship and through the centre of mass. A pitch ...
The waterline is the line where the hull of a ship meets the surface of the water. A waterline can also refer to any line on a ship's hull that is parallel to the water's surface when the ship is afloat in a level trimmed position. Hence, waterlines are a class of "ships lines" used to denote the shape of a hull in naval architecture lines ...
Waterfowl and boats moving across the surface of water produce a wake pattern, first explained mathematically by Lord Kelvin and known today as the Kelvin wake pattern. [1] This pattern consists of two wake lines that form the arms of a chevron, V, with the source of the wake at the vertex of the V.
Clewlines (green) and buntlines (red) for a single sail. The sail here is semi-transparent; fainter lines are running behind it. Clewlines and buntlines are lines used to handle the sails of a square rigged ship. The leechlines are clearly visible running inwards and upwards from the edges of the sail.
The animation demonstrates that the moiré lines of the superposition image move up at a speed, much faster than the movement speed of the revealing layer. When the revealing layer is shifted up perpendicularly to the layer lines by one full period ( p r ) of its pattern, the superposition optical image must be the same as the initial one.
Consider a boat moving from right to left with constant speed v, emitting waves of varying wavelength, and thus wavenumber k and phase velocity c(k), of interest when < v for a shock wave (cf., e.g., Sonic boom or Cherenkov radiation). Equivalently, and more intuitively, fix the position of the boat and have the water flow in the opposite ...
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Barrier-grid animation or picket-fence animation is an animation effect created by moving a striped transparent overlay across an interlaced image. The barrier-grid technique originated in the late 1890s, overlapping with the development of parallax stereography ( Relièphographie ) for 3D autostereograms .