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A wing is also an administrative sub-division of an RAF station. Historically, for a flying station these were normally Operations Wing, Engineering Wing and Administration Wing and each wing was commanded by an officer of wing commander rank. Early in the 21st century, the model changed, with Engineering Wing typically being split into Forward Support Wing and Depth Support Wing, while Administration Wing was redesignated Base Support Wing.
http://en.wikipedia.org/wiki/Royal_Air_Force
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