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  2. Compass - Wikipedia

    en.wikipedia.org/wiki/Compass

    A magnetic card compass is usually equipped with an optical, lensatic, or prismatic sight, which allows the user to read the bearing or azimuth off the compass card while simultaneously aligning the compass with the objective (see photo). Magnetic card compass designs normally require a separate protractor tool in order to take bearings ...

  3. Digital compass - Wikipedia

    en.wikipedia.org/wiki/Digital_compass

    Digital compass may refer to: Digital magnetic compass, solid-state microelectromechanical system compasses; Fibre optic gyrocompass, as in a ship's navigation system; Magnetometer, such as a MEMS magnetometer in hand-held devices

  4. Brunton compass - Wikipedia

    en.wikipedia.org/wiki/Brunton_compass

    Portable electronic devices are changing the way geologists conduct field work. Unlike analogue compasses, a digital compass relies on an accelerometer and a magnetometer, and may provide information about the reliability of a measurement (e.g. by repeating the same measurement and performing statistical analysis).

  5. Ecompass - Wikipedia

    en.wikipedia.org/wiki/Ecompass

    An eCompass or e-Compass is a tilt compensated electronic compass utilizing an accelerometer and a magnetometer. A number of manufacturers, including Motorola, AKM Semiconductor, NXP, Bosch Sensortec, and ST micro make eCompasses. eCompasses are also found in some laptops such as the HP Spectre. Today's smartphones often include an eCompass ...

  6. Fluxgate compass - Wikipedia

    en.wikipedia.org/wiki/Fluxgate_compass

    A fluxgate inclinometer/compass. The basic fluxgate compass is a simple electromagnetic device that employs two or more small coils of wire around a core of highly permeable magnetic material, to directly sense the direction of the horizontal component of the Earth's magnetic field.

  7. Prismatic compass - Wikipedia

    en.wikipedia.org/wiki/Prismatic_compass

    Compass surveying is a type of surveying in which the directions of surveying lines are determined with a magnetic compass, and the length of the surveying lines are measured with a tape or chain or laser range finder. [2] The compass is generally used to run a traverse line. The compass calculates bearings of lines with respect to magnetic needle.

  8. Bearing compass - Wikipedia

    en.wikipedia.org/wiki/Bearing_compass

    The simplest and most common type of hand compass has a horizontal compass rose and an observation device: a pinnule, alidade or viewfinder that allows the user to observe the target and then by "changing view", read the angle formed by the target's direction and the one marked by the compass with respect to the magnetic north.

  9. Azimuth compass - Wikipedia

    en.wikipedia.org/wiki/Azimuth_compass

    The azimuth compass still had great value in letting the master of a ship determine how far the magnetic compass varied from true north, so he could set a more accurate course while following a line of constant latitude or using dead reckoning to navigate. In 1795 a British First Rate ship would have up to eight compasses, of which one was an ...