![]() At non-towered airports, you'll have to contact flight service or a nearby ATC facility directly for a new EDCT time.ĮDCTs are somewhat flexible. At airports with a control tower, the controller has a process for requesting a new EDCT for your flight. Airlines can request new EDCTs for your flight directly from ATC. If you miss an EDCT, you'll have to get a new EDCT which could be a subsequent delay as long, or longer, than your original delay. That would comply with our timing restrictions." So, if your release time is at 1205Z, we could be saying cleared for takeoff around 1201Z, and you would be airborne around 1203. Generally, it takes about 1.5-2 minutes from when you are holding short to be airborne. Not when we will say 'cleared for takeoff.' You can be airborne 2 minutes prior to 1 minute after your release time. ![]() "Whenever we say, 'you're released at xxxx,' that's an airborne wheels-up time. Time-based separation is used for aircraft transitioning to/from non-radar airspace, usually over offshore or oceanic routes. Minutes-in-trail is how much time is needed between aircraft operating along the same route. ![]() Enough space must be maintained between aircraft to keep safe separation, with occasional larger gaps to fit in "merging" traffic along aerial routes or weather deviations. Miles-in-trail describes the number of miles required between aircraft departing an airport, over a fix, at an altitude, through a sector, or on a specific route. Miles-in-trail and minutes-in-trail are two types of separation standards that require ATC to meter the flow of traffic in the sky. Separation standards for aircraft create a challenge for ATC, especially at the busiest airports in the nation. Here's what the normal communication process looks like when delays are issued throughout the ATC system: With So Much Sky, What's The Problem? Air traffic controllers, air traffic managers, pilots, and airline dispatchers all work together to meter the flow of traffic in our skies. ![]() Managing the flow of traffic isn't limited to the FAA, however. They make decisions based on their experience, coupled with software analysis to implement traffic management initiatives which are relayed to individual En Route and Terminal controllers/facilities. Traffic Management is a separate unit of the FAA staffed by air traffic controllers who analyze the demand on the nationwide air traffic system. Who's Calling The Shots?Īir traffic over the United States is managed by Air Route Traffic Control Centers (ARTCCs), select Terminal Radar Approach Control Facilities (TRACONs), and the Air Traffic Control System Command Center (ATCSCC). Here's what you should know about how it works, and the terminology you should use with air traffic controllers. Delays are an inevitable part of being a pilot, and there's a lot that goes on behind the scenes when you're given an ATC delay. ![]()
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