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  2. Geometric dimensioning and tolerancing - Wikipedia

    en.wikipedia.org/wiki/Geometric_dimensioning_and...

    Example of true position geometric control defined by basic dimensions and datum features. Geometric dimensioning and tolerancing (GD&T) is a system for defining and communicating engineering tolerances via a symbolic language on engineering drawings and computer-generated 3D models that describes a physical object's nominal geometry and the permissible variation thereof.

  3. Position tolerance - Wikipedia

    en.wikipedia.org/wiki/Position_tolerance

    Position tolerance (symbol: ⌖) is a geometric dimensioning and tolerancing (GD&T) location control used on engineering drawings to specify desired location, as well as allowed deviation to the position of a feature on a part.

  4. Bearing (navigation) - Wikipedia

    en.wikipedia.org/wiki/Bearing_(navigation)

    If the reference direction is north (either true north, magnetic north, or grid north), the bearing is termed an absolute bearing. In a contemporary land navigation context, true, magnetic, and grid bearings are always measured in this way, with true north, magnetic north, or grid north being 0° in a 360-degree system. [5]

  5. Basic dimension - Wikipedia

    en.wikipedia.org/wiki/Basic_dimension

    In a technical drawing, a basic dimension is a theoretically exact dimension, given from a datum to a feature of interest. In Geometric dimensioning and tolerancing, basic dimensions are defined as a numerical value used to describe the theoretically exact size, profile, orientation or location of a feature or datum target.

  6. Dead reckoning - Wikipedia

    en.wikipedia.org/wiki/Dead_reckoning

    The navigator plots their 9 a.m. position, indicated by the triangle, and, using their course and speed, estimates their own position at 9:30 and 10 a.m. In navigation , dead reckoning is the process of calculating the current position of a moving object by using a previously determined position, or fix , and incorporating estimates of speed ...

  7. True Faith (song) - Wikipedia

    en.wikipedia.org/wiki/True_Faith_(song)

    "True Faith" was created using a wide range of electronic musical equipment. According to an interview in Sound on Sound by Richard Buskin, Hague notes that New Order provided a Yamaha QX 1, an Octave Voyetra 8 polyphonic synthesizer , a Yamaha DX 5 and an Akai S900 sampler, while he provided an E-mu Emulator II and an E-mu SP12.

  8. Average true range - Wikipedia

    en.wikipedia.org/wiki/Average_true_range

    Average true range (ATR) is a technical analysis volatility indicator originally developed by J. Welles Wilder, Jr. for commodities. [1] [2] The indicator does not provide an indication of price trend, simply the degree of price volatility. [3] The average true range is an N-period smoothed moving average (SMMA) of the true range values. Wilder ...

  9. Magnetic declination - Wikipedia

    en.wikipedia.org/wiki/Magnetic_declination

    When plotting a course, some small aircraft pilots may plot a trip using true north on a sectional chart (map), then convert the true north bearings to magnetic north for in-plane navigation using the magnetic compass. These bearings are then converted on a pre-flight plan by adding or subtracting the local variation displayed on a sectional chart.