
1) Measuring instrument
Found on
https://www.crosswordclues.com/clue/tacheometry

Tacheometry (i; from Greek for `quick measure`), is a system of rapid surveying, by which the positions, both horizontal and vertical, of points on the earth surface relatively to one another are determined without using a chain or tape or a separate levelling instrument. The ordinary methods of surveying with a theodolite, chain, and levelling .....
Found on
http://en.wikipedia.org/wiki/Tacheometry
No exact match found.