Linked from

The 14 pages that link to Sextant, each with the reason it gives.

• Celestial navigationRelated: It measures the altitude of a celestial body above the horizon.

• AstrolabeCompared with: The sextant replaced many nautical altitude measurements with more precise angular comparisons.

• Marine chronometerRelated: A sextant could establish local solar time by measuring the Sun’s altitude.

• Equatorial coordinate systemRelated: Celestial navigation can combine observed altitudes with tabulated equatorial positions.

• Marine navigationBroader topic: It is the key measuring instrument in traditional celestial navigation.

• Nautical almanacRelated: Navigators use it to measure the altitudes that almanac-based calculations require.

• Lunar distance methodRelated: Navigators use it to measure the Moon’s distance from a star or the Sun.

• Cross-staffCompared with: Its optical design made celestial measurements more practical aboard moving ships.

• AlidadeCompared with: A sextant measures angles by reflection, unlike an alidade’s direct sighting against an instrument scale.

• BackstaffRelated: The sextant continued the backstaff’s navigational purpose with greater precision and versatility.

• Fred NoonanRelated: Noonan used sextant observations to obtain the angles needed for celestial fixes.

• Vernier scaleRelated: Its graduated arc can be read with a vernier to obtain angular measurements.

• Jacob’s staffCompared with: The sextant replaced simple cross-staff sighting for many navigational measurements.

• StadimeterCompared with: A sextant measures angles for navigation; a stadimeter uses an angle to estimate an object's range.