Basic fighter maneuvers (
BFM) are tactical movements performed by
fighter aircraft during
air combat maneuvering (also called ACM, or
dogfighting), in order to gain a
positional advantage over the opponent. BFM combines the fundamentals of
aerodynamic flight and the geometry of pursuit with the physics of managing the aircraft's energy-to-weight ratio, called its
specific energy. Maneuvers are used to gain a better angular position in relation to the opponent. They can be offensive, to help an attacker get behind an enemy, or defensive, to help the defender evade an attacker's air-to-air weapons. They can also be neutral, where both opponents strive for an offensive position, or disengagement maneuvers, to help facilitate an escape. Awareness is often taught as the best tactical defense, removing the possibility of an attacker getting or remaining behind the pilot; even with speed a fighter is open to attack from the rear.