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line of sight

[lahyn uhv sahyt]

Phonetic (Standard)IPA

noun

Also called line of sighting.��an imaginary straight line running through the aligned sights of a firearm, surveying equipment, etc.
Astronomy.��an imaginary line from an observer to a celestial body, coincident with the path traveled by light rays receivedfrom the body.
Radio.��a straight line connecting two points sufficiently high and near one another so that the line is entirely above the surface of the earth.
Ophthalmology.��line of vision.
sightline.

line of sight

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First recorded in 1550–60

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Examples have not been reviewed.

In a semi-rural location, it has a good line of sight and as radio waves travel in a straight line , it is easy for a pilot to move things in.

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Some of the photographs are arranged freely, as if to follow the line of sight as it traces figures in a space — wind-scattered.

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In a statement the CAA said it was working with companies to make drone operations beyond visual line of sight "a safe and every day reality".

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He was relieved now that there were no longer flames in his line of sight, he said.

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Authorities say that Zhou flew his drone outside of visual line of sight, which would require him to register the drone with the FAA.

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