
1) Tacheometer 2) Theodolite 3) Transit
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https://www.crosswordclues.com/clue/tachymeter

1) Tacheometer
Found on
https://www.crosswordclues.com/clue/tachymeter
[survey] A tachymeter or tacheometer is a type of theodolite used for rapid measurements and determines, electronically or electro-optically, the distance to target, and is highly automated in its operations. Such tachymeters are often used in surveying. Tachymetry or tacheometry is the process of measuring distance indirectly. This can be ...
Found on
http://en.wikipedia.org/wiki/Tachymeter_(survey)
[watch] A tachymeter scale is a scale sometimes inscribed around the rim of an analog watch. It can be used to compute a speed based on travel time or measure distance based on speed. The spacings between the marks on the tachymeter dial are therefore proportional to 1/t where t is the elapsed time. The function performed by a tachymeter is...
Found on
http://en.wikipedia.org/wiki/Tachymeter_(watch)

• (n.) A speed indicator; a tachometer. • (n.) An instrument, esp. a transit or theodolite with stadia wires, for determining quickly the distances, bearings, and elevations of distant objects.
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http://thinkexist.com/dictionary/meaning/tachymeter/

(tә-kim´ә-tәr) an instrument for measuring rapidity of motion.
Found on
http://www.encyclo.co.uk/local/21001
Ta·chym'e·ter noun [
Tachy- +
-meter .]
1. (Surveying) An instrument, esp. a transit or theodolite with stadia wires, for determining quickly the distances, bearings, and elevations of distant objects.
2. A speed indicator; a tachometer.
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http://www.encyclo.co.uk/webster/T/3

[
n] - a theodolite designed for rapid measurements
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http://www.webdictionary.co.uk/definition.php?query=tachymeter

tachymeter An instrument used in surveying to work out distances, elevations, and directions at speed.
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http://www.wordinfo.info/words/index/info/view_unit/1302/39
tacheometer noun a theodolite designed for rapid measurements
Found on
https://www.encyclo.co.uk/local/20974
No exact match found.