Field Manual FM 3-52 Airspace Control October 2016 FM 3-52 Airspace Control, updates the previous 8 February 2013 version of FM 3-52 to reflect lessons learned through recent operational experience and to adapt to the joint airspace community's release of updates to JP 3-52, and ATP 3-52.1 as well as ATP 3-91.1. Two significant changes occur from the previous manual. First, the alignment of air support operation centers with active Army division headquarters allow for the greater responsiveness and flexibility of responsive fires and division assigned airspace. The central idea of this publication reflects the Army's role within a larger framework (unified action) and its focus on maximum flexibility through a philosophy of mission command and an operations process approach. The other significant change from the previous FM 3-52 is a reorganization of airspace coordinating measures.