US Navy’s TCTS II air combat training system secures key approval 04 May 2021 (Last Updated May 4th, 2021 11:09) The US Navy has secured a key approval to initiate the limited production of Tactical Combat Training System Increment II (TCTS II), a next-generation air combat training system. Share Article The Tactical Combat Training System Increment II (TCTS II) achieved Milestone C and has been approved for limited production. Credit: US Navy. The US Navy has secured a key approval to initiate the limited production of Tactical Combat Training System Increment II (TCTS II), a next-generation air combat training system. The Naval Aviation Training Systems and Ranges programme office (PMA-205) received Milestone C approval that will enable the programme to move to limited production in collaboration with the industry partner Collins Aerospace Systems.