Gain the Advantage
The idea is to make it more useful, treating the action as getting a missile lock, lining up a shot, or whatever. Each net success on a Gain the Advantage check turns into an automatic Advantage added to the result of a subsequent gunnery check. This allows pilots to guarantee criticals, or activate a missile's Guided quality.
The difficulty is based on the opponent's Pilot skill + ship handling.
Example:
Two cloakshape fighters try to Gain the Advantage on the Krayt Fang. They'd roll GGY (skill) + PPR (Krayt's pilot's skill) + B (Krayt's bad handling), getting three success, two advantages, and a despair. That'll give them an automatic three additional success to their gunnery check next round (enough for the missile's guidance systems to kick in), an immediate Evasive Manoeuvres, and a collision with the scenery.
See also
See my revised Dogfighting in terrain.