What formation will cause a 4-ship of F-16s to WALL?

The correct answer is based on the tactical principles of using formations in combat scenarios. When the formation of a 4-ship of F-16s is organized such that the distance between the aircraft in azimuth exceeds 20 nautical miles, it leads to a tactical separation that allows the unit to effectively structure their positioning relative to the target area while also increasing their defensive capabilities.

This configuration maximizes radar coverage and engagement options while providing sufficient space between aircraft to minimize vulnerability to enemy defenses, as well as to enhance the ability to engage targets independently without interference. The term "WALL" refers to a specific type of tactical positioning that is beneficial for ensuring both safety and combat effectiveness during operations.

Understanding the dynamics of engagement ranges and target proximity is critical in aerial combat scenarios, and this demonstrates an important strategic consideration in formation flying, particularly in high-stress combat environments. The other options either suggest less effective positioning without achieving the tactical advantage required or misunderstand the basic parameters that define effective formation flying for aerial combat missions.