(AND WHY SHOULD WE CARE?)
Assume an enemy missile is fired at one of SA's new corvette patrol ships. The corvette's first line of defence will be its missile detection radar that picks up the incoming missile and instructs the tracking radar to continue tracking it. As the missile approaches, the tracking radar guides the ship's own missiles and guns to lock onto the enemy missile. All of this is constantly being adjusted for the pitch and roll of the sea by another bit of programming.