Sextant

Over a 20 year period of time, Tycho Brahe made consistent observations which supported the heliocentric theory proposed earlier by Copernicus. These observations were made using only a compass and a sextant.

Tycho Brahe used only a compass and a sextant to observe the stars.

He's an expert with a sextant.

Using a sextant, the sun and a watch to guide him, Amundsen made the 3,000-kilometer round-trip journey from a basecamp in Antarctica in 99 days.

[…] I can do more with a Quadrant, Sextant or Octant, of 1 foot Radius, furniſhed with Teleſcopical Sights and Screws, then ^([sic]) can poſſibly be done with any other Inſtrument, furniſhed only with Common Sights, though 10, 20, 30, nay threeſcore foot Radius; […]

I took our position every morning with my crude sextant; but the results were always most unsatisfactory.

Moskowitz and Devereux have designed a hyperaccurate sextant for interstellar navigation based upon the design of the sextant used by the Apollo astronauts.