WASHINGTON - A system that helps drone pilots navigate the airspace is down nationwide, according to the Federal Aviation Administration."The FAA is experiencing a nationwide outage of the Low Altitude Authorization and Notification Capability," officials tweeted Monday. "Airspace authorizations are currently ONLY available through the FAADroneZone until further notice."According to the FAA, the Low Altitude Authorization and Notification Capability provides drone pilots with access to controlled airspace at or below 400 feet, helps pilots remain aware of where they cannot fly and provides air traffic control with visibility into where and when drones are operating.