polar route air navigation airway (aviation) aeronautical information publication performance-based navigation 1 in 60 rule aeronautical chart aircraft compass turns minimum off-route altitude vertical navigation wind triangle d a f i f aircraft vectoring airport reference point elrey borge jeppesen astrodome (aeronautics) position error missed approach point initial approach fix remote communications outlet ground communication outlet critical area (aeronautics) navigation paradox flight information centre flight inspection reference datum height
Knowledge_Navigation