Statements (34)
| Predicate | Object |
|---|---|
| gptkbp:instanceOf |
scientific instrument
|
| gptkbp:accuracy |
up to 0.2 arcminutes
|
| gptkbp:angleRange |
60 degrees
|
| gptkbp:category |
gptkb:astronomy
gptkb:navigation maritime history |
| gptkbp:component |
astronomer
arc mirrors filters clamp graduated scale index arm micrometer drum vernier |
| gptkbp:displayedAt |
gptkb:National_Maritime_Museum
gptkb:Smithsonian_National_Air_and_Space_Museum |
| gptkbp:etymology |
from Latin 'sextans', meaning 'one sixth'
|
| https://www.w3.org/2000/01/rdf-schema#label |
The Sextant
|
| gptkbp:introducedIn |
1731
|
| gptkbp:inventedBy |
gptkb:John_Hadley
gptkb:Thomas_Godfrey |
| gptkbp:material |
brass
aluminum |
| gptkbp:measures |
altitude of celestial bodies
angle between horizon and celestial object |
| gptkbp:replacedBy |
gptkb:octant
electronic navigation instruments |
| gptkbp:usedBy |
aviators
mariners |
| gptkbp:usedFor |
celestial navigation
measuring the angle between two visible objects |
| gptkbp:bfsParent |
gptkb:Carolyn_Hougan
|
| gptkbp:bfsLayer |
7
|