Abstract: An air navigation obstacle reporting and notification system for providing a centralized obstruction notification system to aircraft pilots regarding unreported and/or unmarked obstructions. The air navigation obstacle reporting and notification system generally includes a plurality of users that enter obstacle data into a control server via a global computer network which are uploaded to and broadcast by a satellite unit. Navigation receivers within the aircraft receive the updated obstruction data and match this data with navigation data (e.g. GPS) to determine if the aircraft heading and altitude will result in a potential collision with an obstacle. If a potential collision risk exists, the pilot is notified visually and audibly by the navigation receiver.