Mr. Declan Fitzpatrick:

That is possible. If a military aircraft transitions through Irish airspace and has a transponder turned on, the secondary surveillance radar will pick it up. If there is no transponder turned on on that military aircraft, primary radar will pick that up predominantly. It may not in all cases. Again, I do not know the capabilities of military entities across the world. If the Deputy wants figures on how many military aircraft passed through Irish airspace, either the Department or AirNav Ireland would be able to help him with that.