What assists in the control and identification of military aircraft while providing tracking?

The correct answer is Mode 3, which plays a crucial role in the identification and tracking of military aircraft. Mode 3 is a part of the radar transponder system and is commonly used for air traffic control and military operations to uniquely identify an aircraft. When an aircraft is equipped with a transponder that operates in Mode 3, it responds to ground radar with a unique four-digit code, enhancing the visibility of that aircraft in controlled airspace.

Mode 1, while also used by military aircraft, is less common and typically provides a limited capability to indicate the aircraft’s type or mission, rather than full identification or tracking.

Mode 2 provides a unique identification for military aircraft as well, but its usage is more specialized and not as broadly applicable for tracking purposes compared to Mode 3.

Mode C is mainly used for altitude reporting but does not offer the same level of identification that Mode 3 provides, focusing instead on supplying altitude data rather than comprehensive tracking information.

Thus, Mode 3 is essential for both the control and identification of military aircraft, making it the most effective choice for tracking in military operations.