Assertion: sextant | /r/HasAspect | adjustable collar screws
Facets:
Source sentences:
text: (Not all sextants, however, have adjustable collar screws.)
text: If the sextant has collar adjustment screws, keep the sextant stationary while looking through the telescope, and gently adjust the collar screws until the second line moves into the center of the telescope's field of view.