Assertion: sextant | /r/HasAspect | advantage
Facets:
value: over the back staff
type: OTHER
value: over a mural instrument
type: OTHER
Source sentences:
text: A sextant based on a large metal frame had an advantage over a mural instrument in that it could be used at any orientation.
text: Simple, elegant and easy to use, the sextant had numerous advantages over the back staff.