 Close Air Support, CASEVAC, and Assault Support), integrate and deconflict indirect fire support (e.g., artillery and mortars) with aviation assets, manage terminal control assets, and procedurally controlling aircraft.MTACS provide the ACE commander with command and control functions necessary for the aviation mission.They establish a Tactical Air Command Center (TACC), which is the operational command post for the Marine Aircraft Wing, from which the Wing Commander and his battle staff command the tactical air battle, including tactical air support provided to ground forces (directed from the DASC in the MASS) and tactical air defense (directed by the TAOC in the MACS).