(n) A surveying tool utilized for the fast determination of distances, elevations, and bearings.
(n) A surveying instrument for quickly finding distances.
(n) An instrument, esp. a transit or theodolite with stadia cables, for identifying quickly the distances, bearings, and elevations of distant things.
tachymeter in Community Dictionary
A tachymeter (additionally tachymetre or tacheometer) is a type of theodolite employed for rapid dimensions and determines, digitally or electro-optically, the distance to target, and it is very computerized with its operations. Tachymeters are often utilized in surveying. by EmanuelReport definition