It would greatly enhance situational awareness and survivability if there were tones associated with an air to air missile attempting a lock, and when the lock has been established and the missile has been fired. The threat direction indicator built into the radar is nice, but it requires the pilot to take his eyes off the center of the screen where all the flying is being done. An audible tone would alert the pilot of a threat, and advise him/her of when it becomes necessary to deploy countermeasures. The tone could be discreet, or in the form of "Bitching Betty".

An example of the implementation would be as follows.

-AA Soldier on the ground initiates lock-on.
-In the cockpit the pilot is presented with a Betty tone stating "Threat".
-AA soldier establishes lock and engages with a shoulder fired missile.
-In the cockpit the pilot is presented with a Betty tone stating "Missile".
-The pilot is able to continue flying and instinctively deploy countermeasures..