Surveying
The nautical mile is the length of

1 minute of latitude
1 degree of longitude
1 degree of latitude
1 minute of longitude

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Surveying
Dumpy level is most suitable when

the instrument is to be shifted frequently
many readings are to be taken from a single setting of the instrument
All of these
fly levelling is being done over long distance

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Surveying
Theodolite is an instrument used for

measurement of vertical angles only
tightening the capstan-headed nuts of level tube
measurement of horizontal angles only
measurement of both horizontal and vertical angles

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