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2. Compass - Wikipedia

   en.wikipedia.org/wiki/Compass

   A modern military compass, with included sight device for aligning. A compass is a device that shows the cardinal directions used for navigation and geographic orientation. It commonly consists of a magnetized needle or other element, such as a compass card or compass rose, which can pivot to align itself with magnetic north.

3. History of the compass - Wikipedia

   en.wikipedia.org/wiki/History_of_the_compass

   A bearing compass is a magnetic compass mounted in such a way that it allows the taking of bearings of objects by aligning them with the lubber line of the bearing compass. [79] A surveyor's compass is a specialized compass made to accurately measure heading of landmarks and measure horizontal angles to help with map making.

4. Magnetic dip - Wikipedia

   en.wikipedia.org/wiki/Magnetic_dip

   Magnetic dip causes the compass to dip upward or downward depending on the latitude. Illustration of magnetic dip from Norman's book, The Newe Attractive. Magnetic dip, dip angle, or magnetic inclination is the angle made with the horizontal by Earth's magnetic field lines. This angle varies at different points on Earth's surface.

5. 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.

6. Earth inductor compass - Wikipedia

   en.wikipedia.org/wiki/Earth_inductor_compass

   The anemometer of the earth inductor compass on the Spirit of St. Louis shows as a small "T" shape above the fuselage behind the wing. The Earth inductor compass (or simply induction compass [1]) is a compass that determines directions using the principle of electromagnetic induction, with the Earth's magnetic field acting as the induction field for an electric generator. [2]

7. Brunton compass - Wikipedia

   en.wikipedia.org/wiki/Brunton_compass

   A Brunton compass, properly known as the Brunton Pocket Transit, is a precision compass made by Brunton, Inc. of Riverton, Wyoming. The instrument was patented in 1894 by Canadian-born geologist David W. Brunton. [1] Unlike most modern compasses, the Brunton Pocket Transit utilizes magnetic induction damping rather than fluid to damp needle ...

8. Earth’s magnetic field triggers a superpower in sea turtles ...

   www.aol.com/news/earth-magnetic-field-triggers...

   A magnetic map aids with location tracking, and a magnetic compass orients them in the right direction. Now, a new study has shown loggerheads actually memorize magnetic fields to help them find ...

9. Magnetometer - Wikipedia

   en.wikipedia.org/wiki/Magnetometer

   A compass is one such device, one that measures the direction of an ambient magnetic field, in this case, the Earth's magnetic field. Other magnetometers measure the magnetic dipole moment of a magnetic material such as a ferromagnet , for example by recording the effect of this magnetic dipole on the induced current in a coil.