DescriptionLord Airey's Battery and Rock of Gibraltar.jpg
English: Lord Airey's Batteries is located at the highest point on the Rock of Gibraltar at a height of 426 meters (1,383 ft). The Batteries are built on the site of O'Hara's Tower and named after Governor General Charles O'Hara. O'Hara had believed that, if a watchtower was constructed on the highest point of the Rock, the Garrison would be able to observe the Spanish fleet at Cadiz. O'Hara's Tower was not successful in its intended purpose and was therefore nicknamed O'Hara's Folly.
O'Hara and Lord Airey's Batteries are two of three surviving 9.2 inch Mark X Coastal Defence Gun emplacements in Gibraltar. The third emplacement is located at Breakneck Battery which continues to under the ownership of the Ministry of Defence and inaccessible. A similar 9.2 inch Mark X Coastal Defence Gun originally sited at Spur Battery below O'Hara's Battery was dismantled and relocated at the Imperial War Museum at Duxford. A photo of the Gibraltar Gun at Spur Battery can be viewed in the set of the same name in this photostream.
The 9.2 inch Mark X Coastal Defence Guns at O'Hara's, Lord Airey's and Spur Batteries had a range of 29,600 yds which easily covered both the Straits of Gibraltar (25,500 yds) and the Bay of Gibraltar (9,000 yds).
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