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Definition of Close support area

Close support area Definition from Government Dictionaries & Glossaries
DOD Dictionary of Military Terms
Those parts of the ocean operating areas nearest to, but not necessarily in, the objective area. They are assigned to naval support carrier battle groups, surface action groups, surface action units, and certain logistic combat service support elements. (JP 3-02)
  
Source: U.S. Department of Defense, Joint Doctrine Division. ( About )