Summer is upon us, and Yanks love to fly on distant vacations, oblivious to the enormous carbon cost associated with that privilege. Shall we take a quick trip to Europe? Maybe lunch in London and zip back to LA for dinner?
We could fly through Gatwick. Or, maybe, let’s not. A recent tweet, with a very telling graphic, suggests Gatwick is a bad idea:
EasyJet 8222, from Valencia to Gatwick on 6/9/2017. Weather was not the issue: it was near perfect that day. On the first pass, the flight went around after descending to approx. 900-ft. This missed approach appears to have been caused solely by NATS’ refusal to properly manage capacity; i.e., too many arrivals in too small a time window. (click on image to view source Tweet)
It turns out, if you study the arrivals to Gatwick, you learn an awful lot, including:
- that lots of privatization has happened in the UK, both to the ATC system, and to the airports … and it is broadly failing to deliver promised ‘benefits’ used to sell the privatization scheme;
- that the UK ATC system, NATS, is grossly inefficient on Gatwick arrivals, even 25-years after it was privatized in 1992;
- that FAA’s NextGen and Europe’s SESAR (the satellite-based ATC automation systems being oversold on both sides of the Atlantic) are both very similar, in how they intensify impacts while accommodating airline profits.
Here’s a PDF compilation of the ten arrivals to Gatwick, preceding the eventual landing of EasyJet 8222. The inefficiencies are astounding. Notice that for all flights, the bulk of the trip is very direct, but the compression for landing at Gatwick is being managed by holding stacks and other arrival delays, all controlled by ATC. This is precisely the same pattern we see in the U.S. At the key hub airports, where FAA refuses to manage capacity while accommodating airline desires to schedule far too many flights, FAA imposes both enroute delays and lots of delay turns to arrivals. This is the case at all the worst NextGen-impacted airports: Boston [KBOS], LaGuardia [KLGA], Kennedy [KJFK], Baltimore-Washington [KBWI], Reagan-National [KDCA], Charlotte [KCLT], Chicago O’Hare [KORD], Phoenix [KPHX], Seattle [KSEA], and San Francisco [KSFO].
Click on the image below for a scrollable view; the PDF file may be downloaded.
Why is Gatwick Such an Inefficient Mess?
Gatwick [EGKK] is the second-busiest commercial passenger airport in the UK, after London Heathrow [EGLL]. Both of these airports are infamous for the enormous noise and air pollutant impacts they place upon residential communities – not just near the runways, but far away as well. Just like with FAA’s NextGen, arrivals are dumped low, slow, and loud, and circuitous delay patterns (like the Arc of Doom) are flown, maximizing impacts.
A key feature of Gatwick is that, although it has two parallel runways, a local environmental agreement disallows use of both runways at the same time; i.e., the main runway (08R/26L) is to be used alone, and the backup runway (08L/26R) is only to be used when the main runway is out of service (for maintenance, etc.).
So, with Gatwick, we have a classic example of limited runway capacity but no thoughtful constraints to ensure profit-seeking airlines do not schedule too many flights. And, every one of these arrival delays stands a high probability of triggering delays on all subsequent flights using the delayed aircraft, for the remainder of the day. In other words, if NATS would address the Gatwick arrival compression issue, they would make huge progress in reducing flight delays across the UK.
What Causes Missed Approaches & Go-Arounds, and are They Problematic?
In a well-managed air traffic world, missed approaches and go-arounds are very rare. Flight crews and ATC both hate go-arounds, as they are a LOT more work. And, they can be dangerous; i.e., in a system built around repetitive and predictable processes, sudden changes inject a lot of risk.
These should not be happening as often as they do for Gatwick. They would not happen there, too, if NATS would impose restrictions against excessive flight scheduling.
Will the U.S. ATC Privatization Proposal Do Better?
Probably not. Given what we have seen so far, in FAA’s fraudulent sales pitches, the botched implementation, and the growing and unresolved impacts, etc., there is a near absolute certainty that privatization of U.S. ATC would be an unmitigated disaster. No efficiency improvements. No cost savings. Reduced transparency. No accountability. Just one more sell-out to industry money, to enable the few airlines and others to do whatever the hell they want.
Just say ‘NO!’ to ATC Privatization: this is Corporatocracy run amok.