Assertion: sextant | /r/HasProperty | essential item
Facets:
value: for navigation
type: PURPOSE
Source sentences:
text: A sextant is an essential item for solving coordinate clues on treasure trails.
text: It is essential for navigation since it helps determine degrees of latitude, telling sailors how far to the north or south of the equator they are located.
text: Sextant is an essential tool for celestial navigation and is used to measure the angle between the horizon and a visible object (or two objects at sea.
text: A sextant is an essential item for solving coordinate clues on treasure trails.