ECHELON

• Groups/ contacts/ formation with wingman displaced approximately 45 degrees behind leader's 3/ 9 line.

ECHO

• Positive SEESAW/ electronic warfare weapons system (EWWS)/ System M/ Mode X reply.

ENGAGED

• Maneuvering with the intent to kill; this implies visual/ radar acquisition of target.

ESTIMATE

• Provides estimate of the size, range, height, or other parameter of a specified contact; implies degradation.

EXTEND

• Short-term maneuver to gain energy, distance, or separation; normally with the (Direction) intent of re-engaging.

EYEBALL ( )

• Fighter with primary visual identification responsibility.
• Electro-optical (EO)/ IR/ NVD acquisition of an aircraft. Normally followed by ( ) number of aircraft observed.