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  2. Ship measurements - Wikipedia

    en.wikipedia.org/wiki/Ship_measurements

    Used mainly to determine the minimum water depth for safe passage of a vessel and to calculate the vessels displacement (obtained from ships stability tables) so as to determine the mass of cargo on board. Draft, Air – Air Draft/Draught is the distance from the water line to the highest point on a ship (including antennas) while it is loaded ...

  3. Beam (nautical) - Wikipedia

    en.wikipedia.org/wiki/Beam_(nautical)

    The beam of a ship is its width at its widest point. The maximum beam (B MAX ) is the distance between planes passing through the outer sides of the ship, beam of the hull (B H ) only includes permanently fixed parts of the hull , and beam at waterline (B WL ) is the maximum width where the hull intersects the surface of the water.

  4. Unpolarized light - Wikipedia

    en.wikipedia.org/wiki/Unpolarized_light

    Conversely, a polarizer acts on an unpolarized beam or arbitrarily polarized beam to create one which is polarized. Unpolarized light can be described as a mixture of two independent oppositely polarized streams, each with half the intensity. [3] [4] Light is said to be partially polarized when there is more power in one of these streams than ...

  5. Beam diameter - Wikipedia

    en.wikipedia.org/wiki/Beam_diameter

    Before the advent of the CCD beam profiler, the beam width was estimated using the knife-edge technique: slice a laser beam with a razor and measure the power of the clipped beam as a function of the razor position. The measured curve is the integral of the marginal distribution, and starts at the total beam power and decreases monotonically to ...

  6. Hogging and sagging - Wikipedia

    en.wikipedia.org/wiki/Hogging_and_sagging

    Hogging is the stress a ship's hull or keel experiences that causes the center or the keel to bend upward. Sagging is the stress a ship's hull or keel is placed under when a wave is the same length as the ship and the ship is in the trough of two waves.

  7. Polarizer - Wikipedia

    en.wikipedia.org/wiki/Polarizer

    Beam-splitting polarizers split the incident beam into two beams of differing linear polarization. For an ideal polarizing beamsplitter these would be fully polarized, with orthogonal polarizations. For many common beam-splitting polarizers, however, only one of the two output beams is fully polarized.

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