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Visual meteorological conditions
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===Uncontrolled airspace (class F & G) === At and above FL 100: :8 km flight visibility, 1500 m horizontally from cloud, 1000 ft (300m) vertically from cloud Below FL 100: :5 km flight visibility, 1500 m horizontally from cloud, 1000 ft (300m) vertically from cloud At or below 3,000 ft: :5 km flight visibility, clear of cloud and in sight of the surface :or, for an aircraft, other than a helicopter, operating at 140 kt or less: ::1,500 m flight visibility, clear of cloud and in sight of the surface :For helicopters: ::Clear of cloud and in sight of the surface at a speed which is commensurate with the visibility.<ref name="caa.co.uk">[http://www.caa.co.uk/cap493 Manual of Air Traffic Services Part 1]</ref>
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