dip sector
English
Noun
dip sector (plural dip sectors)
- (historical) An instrument used for measuring the dip of the horizon. A sextant can be used as one, and historically some instruments were specifically created for the purpose. In reality they appear to have been cumbersome and little used.
Coordinate terms
- optical level
- theodolite
References
- “sector”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
- Royal Museums Greenwich