A similar plan by the same name existed in Canada for many years before it was replaced by the Emergency Security Control of Air Traffic (ESCAT) Plan on October 9, 2002.[3]
Use on September 11, 2001
The U.S. plan has been implemented once (other than tests) since its inception, and even then, it was a modified version. On September 11, 2001, the codeword was broadcast ordering that all U.S. air traffic be grounded, after the September 11 attacks.[4] Even in that instance, the emergency plan was only partially implemented as the Defense Department left command and control of the air traffic system with the FAA and intentionally allowed all radio navigational aids to remain in operation to aid in the process of controlling and landing the thousands of planes which were aloft in domestic airspace.[5]
While several people have been credited with issuing the SCATANA order for a national ground stop, the 9/11 Commission credits FAA National Operations Manager Ben Sliney with effectively issuing the directive. At 9:42 am on the morning of September 11, 2001, after the Air Traffic Control System Command Center learned from news reports that a plane (American Airlines Flight 77) had crashed into the Pentagon, Sliney "ordered all FAA facilities to instruct all aircraft to land at the nearest airport".[6]
^Eberhart, Ralph (June 17, 2004). "Transcript: 9/11 Commission". The Washington Post. Archived from the original on November 10, 2019. Retrieved July 25, 2024. So our SCATANA said, 'Leave the nav aids on.' Our SCATANA said, 'FAA, you still control the traffic that's flying.' Our SCATANA said, 'Law enforcement and Flight For Life can continue to fly.' We don't want to ground them during this terrible tragedy. And then procedures for getting waivers to fly. So we had to take that procedure and modify it to this horrific act that occurred on 9/11.