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Sextant

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A sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects. The principle of the instrument was first implemented around 1731 by John Hadley and Thomas Godfrey.

Facts
Year
1731 1
Sourced to the subject's own accountApproximate, source states around 1731.
Cross-Tradition Connections

Held Differently

John Hadley, Engineers

Why this is disputed. Independently claimed the same octant/sextant principle circa 1731 alongside Thomas Godfrey (co-claimant not wired to a separate entity this pass; recorded as a gap).

Source Sextant (Wikipedia)
Sources
1. Sextant (Wikipedia)
WikipediaLead section (entity-description)
Quote, Lead section (entity-description)
A sextant is a doubly reflecting navigation instrument that measures the angular distance between two visible objects.
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1. Sextant (Wikipedia)
WikipediaLead section (Hadley and Godfrey)
Quote, Lead section (Hadley and Godfrey)
The principle of the instrument was first implemented around 1731 by John Hadley and Thomas Godfrey
View the Source
1. Sextant (Wikipedia)
WikipediaInvented By: John Hadley, History section (inventor attribution)
Quote, Invented By: John Hadley, History section (inventor attribution)
The principle of the instrument was first implemented around 1731 by John Hadley and Thomas Godfrey.
View the Source
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