In Alpha Centauri, with Social Engineering -5 Police states: two extra drones for each military unit away from territory. Why do I get two drones per air unit even if they're in the home base?
All offensive air units are considered out of territory no matter where they are. BUT this does not apply to defensive air units like interceptors (planes/choppers with the air superiority ability). See this article for more info: http://alphacentauri2.info/index.php?action=articles;sa=view;article=33