This area is referred to as Low Flying Area 7, but is better known as the Mach Loop.
A Tornado GR4 at Mach Loop.
Low flying is a demanding skill that can only be acquired through progressive training and continuous practice.
The Royal Air Force uses several areas within the United Kingdom for low level flight training.
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Hercules.
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Tornado GR4.
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Hawk T1.
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F15C Eagle.
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F-15E Eagle.
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Sources:Airspacemag/www.gov.uk/Wikipedia/Telegraph