Airborne Tactical Advantage Company (ATAC, formerly known as VORTEX) is a company engaged in outsourced airborne tactical training, threat simulation, and research and development. It trains navy, marine, air force, army and international aircrews, ship-crews, as well as combat controllers and joint terminal attack controllers (JTACs) in the air-to-air, air-to-ship, and air-to-surface environments.