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  2. Indicator (distance amplifying instrument) - Wikipedia

    en.wikipedia.org/wiki/Indicator_(distance...

    Ideal test indicator pushed. Prior to modern geared dial mechanisms, test indicators using a single lever or systems of levers were common. The range and precision of these devices were generally inferior to modern dial type units, with a range of 10/1000 inch to 30/1000 inch, and precision of 1/1000 inch being typical.

  3. Automatic direction finder - Wikipedia

    en.wikipedia.org/wiki/Radio_Magnetic_Indicator

    The magnetic bearing to the station in this case is 350°. The ADF indicators are a kind of navigational display consisting of a dial and a needle that rotates around the dial and points to the beacon. This needle suggests the "to" bearing of the beacon, and to fly the "from" bearing, 180° needs to be added or subtracted from the reading. [7]

  4. Bearing (navigation) - Wikipedia

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

    In nautical navigation the relative bearing of an object is the clockwise angle from the heading of the vessel to a straight line drawn from the observation station on the vessel to the object. The relative bearing is measured with a pelorus or other optical and electronic aids to navigation such as a periscope, sonar system, and radar systems ...

  5. Direct tension indicator - Wikipedia

    en.wikipedia.org/wiki/Direct_tension_indicator

    The RCSC specification has been adopted, in its entirety, by the American Institute of Steel Construction and appears as section 16 of that organization's Steel Construction Manual. DTIs within the RCSC specification section 8.2.4 are described thus: "ASTM F959 direct tension indicators are recognized in this Specification as a bolt-tension ...

  6. Non-directional beacon - Wikipedia

    en.wikipedia.org/wiki/Non-directional_beacon

    However, using a separate RBI and compass, this requires considerable mental calculation to determine the appropriate relative bearing. [5] To simplify this task, a compass card driven by the aircraft's magnetic compass is added to the RBI to form a radio magnetic indicator (RMI). The ADF needle is then referenced immediately to the aircraft's ...

  7. Pelorus (instrument) - Wikipedia

    en.wikipedia.org/wiki/Pelorus_(instrument)

    In marine navigation, a pelorus is a reference tool for maintaining bearing of a vessel at sea. It is a "simplified compass" without a directive element, suitably mounted and provided with vanes to permit observation of relative bearings. [1] The instrument was named for one Pelorus, said to have been the pilot for Hannibal, circa 203 BC.

  8. Radio beacon - Wikipedia

    en.wikipedia.org/wiki/Radio_beacon

    In navigation, a radio beacon or radiobeacon is a kind of beacon, a device that marks a fixed location and allows direction-finding equipment to find relative bearing. But instead of employing visible light, radio beacons transmit electromagnetic radiation in the radio wave band. They are used for direction-finding systems on ships, aircraft ...

  9. Total indicator reading - Wikipedia

    en.wikipedia.org/wiki/Total_indicator_reading

    In metrology and the fields that it serves (such as manufacturing, machining, and engineering), total indicator reading (TIR), also known by the newer name full indicator movement (FIM), is the difference between the maximum and minimum measurements, that is, readings of an indicator, on the planar, cylindrical, or contoured surface of a part ...

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