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2. Goniometer - Wikipedia

   en.wikipedia.org/wiki/Goniometer

   A half-circle protractor marked in degrees (180°). A protractor is a measuring instrument, typically made of transparent plastic, for measuring angles. Some protractors are simple half-discs or full circles. More advanced protractors, such as the bevel protractor, have one or two swinging arms, which can be used to help measure the angle.

3. 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 ...

4. Silva compass - Wikipedia

   en.wikipedia.org/wiki/Silva_compass

   Silva Field baseplate compass on a map. Silva Sweden AB is an outdoors products company that sells handheld compasses and other navigational equipment including GPS tools, mapping software, aircraft altimeters, and marine navigation tools.

5. History of the compass - Wikipedia

   en.wikipedia.org/wiki/History_of_the_compass

   It combined a compass with a protractor built into the base. His design featured a metal compass capsule containing a magnetic needle with orienting marks mounted into a transparent protractor baseplate with a lubber line (later called a direction of travel indicator). By rotating the capsule to align the needle with the orienting marks, the ...

6. Compass (drawing tool) - Wikipedia

   en.wikipedia.org/wiki/Compass_(drawing_tool)

   A beam compass and a regular compass Using a compass A compass with an extension accessory for larger circles A bow compass capable of drawing the smallest possible circles. A compass, also commonly known as a pair of compasses, is a technical drawing instrument that can be used for inscribing circles or arcs.

7. Orienteering - Wikipedia

   en.wikipedia.org/wiki/Orienteering

   Thumb compass and protractor compass. The basic equipment required for orienteering is usually listed as a compass and appropriate outdoor clothing. Most national bodies recommend that a whistle be carried for safety reasons. Competitive orienteers usually use specialized equipment: A thumb compass, or protractor compass on a short wrist cord.

8. Navigational instrument - Wikipedia

   en.wikipedia.org/wiki/Navigational_instrument

   Bearing compass used to determine magnetic bearings of landmarks, other ships or celestial bodies. ... Navigation protractor triangle; References

9. Breton plotter - Wikipedia

   en.wikipedia.org/wiki/Breton_plotter

   Breton Plotter. A Breton plotter (French: Rapporteur Breton), also known as a Portland course plotter or Weems protractor named after later manufacturers producing similar devices, is a navigational instrument used for nautical navigation with charts.