
Sneaking up behind me, are you? Here’s an infrared view you might need to heed: not the hotspots, but powerful the twin horizontal corkscrews of air current swirling off the wingtips of my jet. They’re wily, dangerous, and not to be trusted.
According to the Flight Safety Foundation, the vortices from a jet can have an internal rotation of up to 300 feet per second and often extend between 2 and 10 nautical miles behind a jet aircraft. The twin tornadoes–that’s literally what they are, horizontal but spinning powerfully–sink at a variable rate, between 300 and 500 feet per minute to an altitude between 500 and 900 feet below the aircraft’s flight path and can persist for three or more minutes depending on the meteorological conditions.

That’s the problem, but hardly the full situation. Add to this hazard the closely constrained flight path of jet traffic in terminal areas. For instance:
Approaching from the east, you’ll have a traffic stream from the west as well converging on the same runway complex. Not unusual as far as airports go–except that San Francisco International has less than the standard distance separating the two parallel runways. The FAA has waived the normal lateral separation, but you’d better keep that in mind nonetheless because that also means less than normal separation from the vortices of the aircraft next to you. Remember the outward spreading motion of those two tornadoes?
This guy could be your dance partner all the way down final–and if he’s next to you, you aren’t entitled to the separation you’d get if he were ahead of you. Mostly, ATC will “advise” you to “use caution” for the heavy on the west runway, workload and time permitting–but they don’t have to.
And time and workload may not permit any advanced warning, and adverse weather can shroud the entire scene anyway:
Look at the inset on the bottom right corner: Seattle (one of my favorite destination cities!) has three parallel runways grouped together, and you won’t be told which of the three runways you’re landing on until you turn base to final about three minutes from touchdown. Would it make sense or even be possible to keep you informed of the heavies on all three inbound tracks? Add to the mix the typically obscured Seattle visibility, plus the added workload of programming and validating the FMS sytem approach waypoints at the last second demanded by the late runway assignment and is there a possibility of situational awareness overload, on final approach: was that a heavy in front of us? Or on the outboard runway?

Bring that back to San Francisco, where the standard runway separation is “waived,” like in MSP and many other cities. Now you’ve got a “buddy” laterally whose wake turbulence is drifting outwardly–just as yours is–and just because he’s not a “heavy” doesn’t mean he can’t roll you.
The ICAO worldwide “recommendation” for separation between a “heavy” and a “medium” following aircraft (say, a 747 and a 737) is 5 NM (9.3 KM); between two heavies, 4 NM (7.4 KM). But the wild card not even mentioned in the separation rules is configuration and maneuvering: simply put, a “dirty” jet (flaps, gear) creates a nastier wake than a “clean” jet, and maneuvering distorts weight. That is, if I level off my 160,000 pound 737 with an addition one-half “G” force, I add to the effective weight another 40 tons of effect. And we’re a medium jet–imagine a heavy maneuvering dirty adding to his effective weight and wake.

That’s the science, now here comes the art. You know the reported winds at the field, but that’s a red herring: your encounter with wake turbulence won’t happen on the field. You need to be aware of the winds on approach, at your altitude. If the lateral wind at your altitude is blowing into the other jet’s wake, here’s what can happen: if the drift equals the outward spread momentum of the wake–and you have to figure the “dirty,” “maneuvering” wild cards mentioned above–the effect will either be to move the wake away more rapidly, or freeze it in place till it dissipates. Which is it?
You can’t see wake turbulence. You can’t be sure where it is, or know it’s strength based solely on the aircraft designation. And sooner or later, you’ll find yourself in it despite your best, most diligent precautions. What are you going to do, captain?

For a true jethead like me, the first answer is always speed–but not so fast (pun intended): you’re configured with restrictive maximum flap speeds. If you’re in a final configuration with 40 degrees of flaps, you’re limited to 162 knots max. But the second instinct is valid: power.

But power alone is only part of the answer: what you’re not doing is going down. Why not? Because we know the vorticies are sinking. If we remain level or climb, we’ll escape the effects. What are they?
The Flight Safety Foundation survey of hundreds of wake turbulence encounters reveals uncommanded roll in trailing aircraft of up to 45 degrees at altitudes below 1,000 above the ground. One thousand feet is another magic number at my airline: stabilized approach (on speed, on altitude, power set) is mandatory from 1,000 feet to touchdown. On glidepath–not above or below; not accelerating or decelerating, power set to flown speed and stable. And certainly wings level.
Which brings up the next problem of two major headaches you’ll instantly own. First, the right amount of counter-aileron, even if applied prudently, in many jets will bring up the wing spoilers to drop the low wing rapidly, inducing adverse drag, requiring more power.
Second, the option of climbing or even flying level is constrained by the published missed approach: protected airspace may be below you if you are above the missed approach altitude. And laterally, not only is there often parallel traffic, there’s also dangerous terrain you must always monitor and stay clear of:

If you encounter wake effects in a level portion of the approach segment, prior to the aircraft ahead descending, at least you know his vortices will descend eventually below you and in this case, you normally feel the “burble” which now cues you: if the winds are keeping his wake aligned with your flight path, on glidepath you’re likely to fly into the tornadoes again when you’re slow and configured with speed-restricting flaps. Now look at the “mileage separation:” still think distance alone is enough? Still committing to the glidepath?
All of that doesn’t even consider the added, inevitable spoiler in every approach: weather. There’s more than terrain and aircraft for you to avoid in a very constrained airspace.

There’s really only one good answer: up. And “up” may be a s simple as “no more down,” meaning a stopped descent or a slight climb to exit the effects. In any case, if you’re below 1,000 feet you’re no longer “stable” per the mandatory requirements. If you’re above 1,000 feet, you’ve just been cued that the mileage interval, given the meteorological conditions, nonetheless has left you vulnerable to the adverse effects of wake turbulence–and you’re not going to proceed.
Which means, in the immortal words of my old friend the Chief Pilot at my airline addressing my 1991 class of Captain’s “Charm School” (officially, “Captain’s Duties & Responsibilities”) as we sat rapt: you’re going to “get the hell out of town.” Amen.

Back in the cabin? Expect the usual complaints about the delay for the second approach, plus a regular dose of exaggerated “there I was” tales about their wake turbulence encounter. So, don’t tell them–if you’ve done your avoidance and even escape properly, they’ll never know you even had a problem, which is the ultimate goal anyway: detecting and avoiding the problem in the first place.
The end result is, what they don’t know won’t hurt them, because you won’t let it. And that’s kind of why you get the privilege of flying the jet in the first place, isn’t it?






















To demonstrate the veracity of this story, here are my qualifications: none. I’d tell you I’ve flown thousands of times, but the truth is; I haven’t. I’ve sat in the back…and done nothing… (Usually F, but “the back,” nonetheless) while someone else has flown me thousands of times. A certified ass-sitter. I’d offer the 60 some hours of single-engine piston time I have, though that’s also irrelevant when you’re sitting in 25C, and the “I’m a private pilot and I KNEW something was wrong” doesn’t fly either, pun intended. Or worse yet, I recently heard someone feign importance with that disgusting sentence, but referred to himself as a “GA-VFR pilot.” Go ahead; tell the FAA you’d like “one general aviation-visual flight rules, to go please”. Incredible.








What better to beat the blistering heat of a Jethroplex summer than a float in your own ce-ment pond? You bid the later-in-the-day flights and you’re senior enough to hold them. That means the morning run–helps you sit still for the 6 or 7 hours you’ll be in the air–and an early afternoon swim. Then, reality check waiting on the iPhone:
You knew that. LaGarbage today, tomorrow too–then LAX the next day. That’s your work week. Get ready.
That’s the current radar picture in the New York metro area. The stuff just north of Tom’s River will be a problem if it doesn’t move out to sea. You can tell there’s a front line between Jersey and NYC somewhere–just look at the temperature difference. Cold air slipping under warm air produces big boomers, and it doesn’t take much of that to disrupt the inbound flow to Kennedy, Newark and of course, LaGuardia. Shrug. Deal with it when you get there–but prepare for it before you take-off: more fuel.
Board 160 passengers. Preflight. Taxi out. Climb.
Radar watch is beginning to turn up signs of the frontal clash converging on the northeast. Super radar–good picture out beyond 300 miles, has it’s own GPS so it knows where all topographical features are and screens them out of the radar image. Good to be sure that what we’re seeing is nothing but weather.
Lunch? Dinner? Whatever–it’s the last food you’ll see today. Everything at LaGarbage will either be closed or out beyond security, which you don’t have time for: they’ll be clamoring to board 160 passengers outbound as soon as you get there. Speaking of which, within an hour of landing, we can get the current weather at LaGuardia and print it out:
The FMS begins its backward countdown of miles to go and upward count of vertical velocity required to satisfy the arrival restrictions. Cool?


Refiguring the approach is not a big deal. But it’s a bad sign: runway changes take time and lead to a huge backup on the ground at LaGuardia. Plus shifting winds mean unpredictable weather due to frontal passage. Alright, plan “B” is the runway 4 approach. Reprogram the FMSs, the courses and the nav radios.
More jets at the bottom of the stack are heading for Philly; we’re still sound fuel-wise. Patience.
The ugly blotches here are actually the towering cumulus we’re sinking into here:
Already have the crew strapped in, all passengers down. Actually, the bad weather is a relief in a way: everything slows down as radar separation is increased. Plus, the approach is a straight-in, precision approach rather than the hairpin visual approach that is officially called the “Expressway Visual:”
Lots more fun from a pilot standpoint, but definitely more hectic. Finally, the wide swing to finally. Configure. In the slot: altitude, airspeed, configuration, glide slope, localizer.
No time for relaxing–it all starts again in 50 minutes, outbound with another 160 passengers impatiently waiting to board. The inbound holding and the LaGarbage ground congestion has already set us behind schedule, and passengers have connections to make at DFW.





I couldn’t hear the exact back and forth between the steamed woman and the officers, but in the end, it seemed the officers weren’t the cause of her anger: she grabbed her boarding pass, shot a pointed glance back at her handcuffed partner—then boarded the flight.
You’re traveling by air this summer? Good. But there are a few things you should know and be sure of BEFORE you get to the airport. And, of course, some shortcuts and time-savers and more things you should be aware of once you get to the airport to avoid an ugly surprise on check-in.
Combine that with tight customer service staffing and you have the makings of a travel headache–which is preventable. Read on.
2. Know your status. That is, are you protected from cancellations or delays? If you have a deadline at your destination–say, a time sensitive event (wedding, graduation, business meeting, etc) or follow-on reservations (a resort or cruise booking, or flight on another carrier), what protection do you have in the event of a delay or cancellation?
Be aware that most airlines offer compensation or modified travel in the event of situations within their control (say, flight cancellations or mechanical delays), but most people don’t seem to know that airlines and federal regulations do not stipulate any accommodation for weather-related delays or cancellations. Thunderstorms at a major hub, in summer–what are the chances? Pretty darn good, unfortunately. And along with rain, hail, and damaging winds, storms usually bring delays, cancellations and misconnects.
Are you prepared to sleep on the floor of the terminal if weather delays you inbound and the last flight of the day to your destination has already departed? Don’t plan tight connections–or in my opinion, any connections to the last flight of the day, for exactly that reason. But if you must, be prepared to find an airport hotel on your own or, sleep in the terminal. Ugh.
One further note about “knowing your status,” and this is important: did you buy your ticket from an online source other than the airline itself? If so, read the “conditions of carriage” before you agree to the purchase of a ticket: many of the larger online travel sites sell bargain basement seats–but they are for a specific flight, with no recourse if you miss the flight. In other words, the deeply discounted seat does not come with any airline follow-on obligation–that’s how the online site got the cheap pricetag they sold you on. But again, if you misconnect for any reason, your travel is over.
First, sign up for whatever notification app your airline offers. Not only will this automatic function give you an immediate heads-up on your assigned gate and departure time via text message or email, many major airlines will also notify you of a cancellation or significant departure or arrival delay long before the delay appears on monitors in the terminal.
Want to play Superman? Turn your cell phone on as soon as allowed after landing. You’ll be notified by text or email of any cancellation on your itinerary–then you can call the re-booking number on taxi-in and start damage control to save your trip. Same goes for the hours before your origination–keep listening for the text alert regarding your flight. Even if things go well, you’ll want to know what gate you’re scheduled to depart from. In all cases, have your reservation info handy for re-booking–an agent on the phone or face-to-face can access your itinerary instantly if you can provide the record identifier (usually a series of letters and/or numbers) on first contact.
It’s going to be a busy summer for air travel this year, with record crowds and limited customer service options in the case of weather-related delays. But these three simple steps will put you well ahead of the crowd all rushing to rebook flights or deal with a delay. Secure your seat, know your options, stay informed and be ready to rebook.
Little big man standing by the gate, already gone.
Way too familiar, and I’m too foolish to pretend I don’t notice. Last minute, before boarding myself and stepping into the cockpit, staying out of everyone’s hair until about ten minutes prior to push, I do what I can. Mom’s there, bereft, dying a little inside, not even hiding her pain. What can I do?
First, parents: ante up. All major airlines now have programs to care for kids who fly “Unaccompanied,” or “UM:” Unaccompanied Minor.” They are not not free. But they are essential. Your child will be logged in to the system, your credentials and those of whomever is on the other end will be verified. So whoever picks up your child will be positively identified by official documentation: driver’s license, passport or government issued ID. I watch it every week: our flight attendants will walk your child out and verify that they are delivered to the correct person.
Mid flight? You say you’ve booked them on a thru-flight, meaning no aircraft change enroute? GMAB! I can’t tell you how many times my flight sequence from one coast to the other, same flight number, supposedly same aircraft, gets changed. “Take all of your belongings of the plane,” the agent will say on the P.A., “and proceed from this terminal to the new gate in the other terminal.”
Important to me, hope it is to them. Regardless, when we have the UM vouchers, now my crew knows who they are and where they’re sitting. And someone will hand-carry them to where they need to be.
Back to our departure. Mom ready to crater, her son already on my jet. I approached her from behind.
For many passengers, flying is an unfamiliar, sometimes confusing experience made all the more so by the lack of understanding of inconveniences like ground delays.
Why?
Why more spacing? Because if we as pilots can separate ourselves from other aircraft visually on an approach and landing, we need only five miles of separation. If we’re flying in reduced visibility, that separation requirement at least doubles to ten miles. That cuts down the number of arrivals possible per hour.
Why? This happens at DFW now and then because of the seven runways, five are oriented north-south, two are northwest to southeast. Doing the math, two runways rather than seven handling arrivals will of course mean delays.
Why? Sometimes it becomes a question of real estate: if a storm at your destination has stopped their outbound aircraft from taking off, there often is simply no room to taxi and park a slew of inbound aircraft. This is particularly true at small, congested airports like LaGuardia and Washington Reagan, but even large airports like DFW can become gridlocked as well.
What about when you’re told there’s an “outbound Ground Stop” for your airport? Rare, but it happens.

Plus, in my pilot mind, after about forty minutes of holding, my air sense tells me it’s time to find a better place to land. It’s simply not prudent from a pilot standpoint to arrive at an alternate without extra fuel for contingencies there. And if we do have to divert, depending on how long my crew and our duty day has been, the FAA may mandate that we’re done flying for the day–which means you are too, wherever we are.


That’s here, middle of the night here, before you messed it up. Spartan. Antiseptic. Do not disturb. A trail of clothes from the door to the bed–worry about everything else tomorrow.
Sleep, and it’s that dream again: you can find the gate, find the plane, but there’s no door from the gate to the plane. Which is the way home, of course. No way home–just the waiting place, halls of marked time and any old place.
Good dog–you’re ready to swim in the deep blue. People will ask you questions, like “What’s it like to be a trained dog working in the blue every day?” Or maybe they’ll have something equally inane more for each other than for you, like “we’ll let him on” or “we need him” as you try to slip by them going to the office. Funny stuff, right? More likely, though, they have to go to the bathroom; they want to share that with you, assuming you have a constant awareness of toilets and locations, like you do with bailout airfields and low fuel contingencies in flight, right? Funny stuff.
Just get me to the gig. Snake through the masses herding across the wide-open plains, grazing, mooing; hoofbeats at a shuffle.
The ants go marching out again, hurrah. Step around, mind the Mickey head. Wind your way through; heft the bags, schlep the bags, onward to the gate. Show your ID: yeah, it’s Mickey. Let him on board.
She’s your big ol’ dance partner, every song, every leg, and just like you: all about the getting there–but not staying. Folks trundle off, more trundle on; makes no difference. We do our same dance steps, carefully and deliberately without art. Over and over–same old song. You know the words:
We say Mass for the Earth, the litany of escape–then we leave, but everyone still in their pews, seatbelts on and tray tables stowed. Then the aluminum conga line–every-buddy-CON-ga– to the runway. This:
In this:
Unpressed and rumpled–doesn’t matter; a little faded, all the better. That’s cruising, ain’t it? It’s like Saturday against your skin. That’s the jailbreak from the suitcase–off with the polyester, and Mickey’s head; jeans, amen.

Used to have different cues that signaled the top of descent point before we had the precision of dual Inertial and multiple GPS systems tied to multiple flight guidance computers figuring descent rates and distances down to a gnat’s ass. One that was nearly infallible:
No, they didn’t call up front and suggest descent. They went into the First Class lav near the cockpit and unleashed a cloud of hairspray and fu-fu to get ready to look great in the terminal between flights. They always somehow just knew it was about time to touch up the war paint and big hair–which was our clue up front that “hey, must be time to start down.”
I like to use Mexico City as an extreme example, because it shows that there’s really no “one size fits all” with those factors above: MEX has a 12,000 runway, but the airport elevation is 7,300 feet. So despite the long runway length, aircraft performance and maneuverability are reduced by the high pressure altitude–not a good thing when flying slow and dirty as you must to land–the higher true airspeeds at altitude have you touching down with a hell of a ground speed, making this long runway a challenge for stopping nonetheless.
Meanwhile, Santa Ana “Orange County” Airport is at sea level, with a crowned and grooved runway–but it’s only 5,700 feet long. As a comparison, the take-off runway at DFW is 13,000 feet long. Stopping the jet at Orange County is as dicey as it is at Mexico City.
There are those who think because a runway is long, clean and dry that stopping can or should be a leisurely affair: some copilots have actually pre-briefed “I’m going to use minimum braking or reverse and let it roll.”
No matter what runway you land on, there is a certain landing distance required due to the kinetic energy the brakes must absorb to stop the tons of metal, fuel, bones and blood still thundering forward at flying speed. Whether that distance is 3,000 feet or 8,000 feet, it makes the most sense to take care of the kinetic energy right away. Once it’s absorbed and the jet decelerated, you can do whatever you want with the runway remaining.
“Runway behind you!” It’s useless, wasted, history, toast. If you’re still rolling without braking properly, you’re toast if anything goes wrong after touchdown.
And there ain’t no ‘splaining it to the FAA after you don’t stop on the runway.
No floating, easing it down. On speed–neither too fast (more kinetic energy) nor too slow (high nose angle, possible tail strike) and within the zone Moses above is stressing–even though aircraft were for him still a couple thousand years down the road.
Forget about them and their ignorance–you have a job to do: on speed, at the correct touchdown point and sometimes, firmly: if the runway is wet, we don’t flirt with hydroplaning. I don’t give a damn if to the passengers it feels like everyone in China just jumped off a chair–we plant it, stop it and taxi to the gate.
Engineering data shows that hydroplaning is most likely at the speed that is 9 times the square root of the tire pressure. Our main tires are at around 205 PSI. So, 9 x 14.32 = 128.88 knots as the primary hydroplane zone.
That formula works for your car, too: 9 x 6 = 54 mph as your primary liability to hydroplaning–and like in a jet, don’t give up: once you get through that speed zone via smooth deceleration, you will get control back. Too many people on the highway and on the runway think that once hydroplaning starts–that’s it. Stay with it, you will slow and regain control. And that is today’s
Okay, we’re back. So God gave Moses this to help him:
Autobrakes: the greatest advancement in commercial aircraft since flight attendants gave up on big hair (breathe easy on top-of-descent). The “RTO” setting is for “Rejected Take Off,” or abort. We’ve talked about that recently. You don’t subscribe? That’s a shame.
If you’re the lucky guy in the left seat of a 737-800, you don’t even need to look inside from this point on, except to verify gear and flap positions before landing.
This video was passed to me by a friend of mine a few years ago. He was killed last Spring in an ATV accident, but his memory lives on with those who knew him in the Air Force and afterward. The video was not shot from the aircraft type that I fly, but it’s an airport I’m very familiar with, and it has many of the complications we just talked about. A tip on the video: if an ad pops up, just click on the “x” in the right corner to get rid of it. And if you click on the triangle above and just right of the “360p,” you can choose a higher video quality.
