The Boeing MQ-28 Ghost Bat, previously known as the Boeing Airpower Teaming System (ATS), is a Loyal Wingman class stealth, multirole, unmanned combat aerial vehicle in development by Boeing Australia for the Royal Australian Air Force (RAAF). It is designed as a force multiplier aircraft capable of flying alongside crewed aircraft for support as part of an integrated system including space-based capabilities, and performing autonomous missions independently using artificial intelligence.

A loyal wingman is a proposed type of unmanned combat air vehicle (UCAV) which incorporates artificial intelligence (AI) and is capable of collaborating with the next generation of manned combat aircraft, including sixth-generation fighters and bombers such as the Northrop Grumman B-21 Raider. Also unlike the conventional UCAV, the loyal wingman is expected to be capable of surviving on the battlefield but to be significantly lower-cost than a manned aircraft with similar capabilities. In the US, the concept is known as the collaborative combat aircraft (CCA).