However, unless general aviation pilots decided to go a step further and equip their aircraft for ADS-B In, their flight deck situational awareness was little improved.
My epiphany on this subject of ADS-B occurred a couple of years earlier. I had flown our university fleet equipped with ADS-B In since 2003, but my pocketbook dictated the lower-cost Out option for our personal ride. Then, my attitude changed. Climbing east out of Montgomery-Gibbs Executive Airport (KMYF) in downtown San Diego, I switched from tower frequency to approach control and immediately heard the collision alarm ringing in the background.

Bringing my eyes smartly up from the BendixKing KX-155 radio face, I was greeted by the sight of a Cessna twin in my windshield. We were offset slightly, and each banked hard away from the other, but the passage was close enough to read the N-number without much difficulty.

For those unfamiliar with this particular patch of airspace, traffic heading both east and west encounters a shallow band of uncontrolled airspace between the top of the Gillespie Field (KSEE) 2,400-foot Class D airspace, located a few miles west of Montgomery-Gibbs, and the 4,800-foot floor of the San Diego Class B. Nearly all traffic in this little piece of sky is either climbing or descending, so cardinal altitudes are not much help. I had a long time to think about that close call on the two-hour flight back to Prescott, Arizona, and decided right then and there that we would find the extra bucks to go for the whole enchilada, ADS-B In. I have not regretted that decision.

• READ MORE: A Short Flight Home Takes A Heart-Stopping Detour

ADS-B In, Out, or Both?

When I decided to break the piggy bank and install ADS-B In, the cost was fairly significant. And with an FAA mandate approaching, discounts were hard to come by. Today, the opportunities for ADS-B In and Out installations are much more affordable. Additionally, portable ADS-B In solutions are available that data link to your iPad. However, not all ADS-B systems are created equally.

Above 18,000 feet, and generally around the world at all altitudes, 1090 MHz ES (extended squitter) rules the roost. However, in the U.S., below Class A airspace, 978 MHz UAT (universal access transceiver) is preferred. Most transponders have both, but some portables may, or may not. UAT allows the ADS-B In user to obtain flight information services (FIS-B) for weather and useful flight information, and traffic information services (TIS-B). TIS-B provides non-ADS-B radar target information from local ATC radars through the ADS-B ground stations.

The moral of this story is that it is up to each pilot to fully understand what information and protections their particular ADS-B In system provides.

‘O Canada’

Once across our northern border, the FIS-B and TIS-B services provided by the U.S. 978 MHz UAT are no longer available. And while the FAA remains committed to its ground-based system, Nav Canada is rapidly converting to satellite-based ADS-B. Pilots flying in Canadian Class A airspace after August 10, 2023, are required to have antenna diversity. This is a fancy term for an additional antenna on top of the airplane.

The satellite-based ADS-B mandate extends to Class B airspace in May 2024, and likely to the rest of Class C, D, and E airspace in the 2026 to 2028 time frame. Some lower-cost ADS-B Out solutions already meet that requirement, especially those mounted on wing and tail beacon sockets. However, many legacy ADS-B In solutions will require an additional antenna, and some systems may not support antenna diversity at all. All good things to know if you are flying north to enjoy the amazing Canadian hospitality.

ADS-B Under VFR

For the record, in the VFR environment, the “Mark One Eyeball” mode is still king. However, in this see-and-avoid environment, ADS-B really shines. GA aircraft are pretty hard to see more than a couple miles away. If the lighting and contrast are just right, our little planes might be visible from 4 to 5 miles away, but that is the exception to the rule.

Once the sun sets, visibility is much better, especially on clear nights with landing, strobe, and position lights on. However, at night long-range depth perception can be a problem. A 10-mile distant target can appear close, and vice versa. Day or night, ADS-B In makes it easier to correlate the range to the target and find the perfect quiet spot in the practice area, 15 miles ahead. However, ADS-B In is only a tool, and a thorough visual scan is critical. Outside of controlled airspace, some aircraft have ADS-B In, some ADS-B Out, and some have nothing at all. So, relying on the ADS-B traffic display to separate us 100 percent of the time is unwise.

ADS-B is also very useful when approaching a nontowered or Class D airport. Ten miles out, ADS-B In is a great planning tool to identify who is in the pattern, who is approaching the airport, and where we might sequence in. Once we get closer, the transition to visual separation and reliance on the aural warnings provided by the ADS-B In system become the better option.

ADS-B Under IFR

ADS-B presents your aircraft differently on the radar controller’s scope. Traditionally, radar targets update every six seconds for approach control and every 12 seconds for an en route display. ADS-B targets update every second, so controllers see them move smoothly across the screen. In the en route environment, this allows radar controllers to reduce separation from 5 nm to 3 nm. On the other hand, with ADS-B In targets fed into our flight deck display, it can be mighty tempting to “help out” the air traffic controller.

Resist this temptation to assist by quietly changing speed or direction. Self-separation is not allowed in the IFR environment. However, if a pilot sees that they are losing separation with other traffic, or that a change in their clearance might help smooth out the traffic flow, the controller will welcome the call, issue updated instructions, or explain why not.

All Towers Are Not Equal

Federal ATC towers are most often equipped with the same ADS-B, and primary and secondary radar found in the approach control. However, some FAA contract towers are not, so following their instructions to the letter, keeping your eyes out the window, and monitoring the ADS-B In display is a great backup to ensure safe separation.

“What we’ve got here is a failure to communicate.”—Cool Hand Luke

Gone are the days of “Tally Ho,” climb to “Angels 15,” and, even more recently, “Taxi into position and hold.” These “Battle of Britain” holdovers sound great but did not make it into the pilot/controller glossary. However, when we hear pilots identify traffic on ADS-B, it often sounds like, “got it on the fish finder,” “gadget,” or “gizmo.”

Maybe we should just call it what it is, ADS-B, and remember that “visual contact” is still the gold standard.

The Leap from Out to In

Four years after the ADS-B mandate, the options for both ADS-B In and Out are plentiful, and we are all still finding ways to use it. ATC has embraced the technology, and the pilots flying in the system are pleased with the increased situational awareness and safety provided. The leap from ADS-B Out to ADS-B In is particularly startling. Every pilot I have interviewed has been amazed at just how much traffic they had been missing. Maybe that has been your experience as well.

Fly safe and keep a sharp eye out for traffic!

Editor’s Note: This story originally appeared in the JAN/FEB 2024 issue of Plane & Pilot magazine.

The post Pro Tips for Private Pilots: ADS-B, Are You ‘In’ or ‘Out’? appeared first on Plane & Pilot Magazine.

Pilots understand that adherence to professional standards is nowhere more critical than during approach to the airport and landing. Fighter pilots instinctively understand this. When they return to the airfield or aircraft carrier, the formation gets a little tighter and the radio calls are more concise.

They follow the rules partly because they understand the cost of making a mistake is high, and they know everyone is watching.

The Super Bowl of traffic pattern operations is Hartsfield-Jackson Atlanta International Airport (KATL) during rush hour. Hundreds of flights coordinated into an aerial ballet, a series of machine-gun-like radio instructions, carrying thousands of passengers safely to their terminal just in time so they can run and catch their next flight. Achieving this level of safety and efficiency requires everyone to adhere to a strict code of behavior. However, the same may not always be said of the traffic pattern at your local towered or especially nontowered airport.

So why do we care about traffic pattern discipline so much? According to the FAA’s Airplane Flying Handbook (AFH), the vast majority of midair collisions occur in good visibility between aircraft going in the same direction, near uncontrolled airports, and at altitudes below 1,000 feet. Sounds like Saturday afternoon in the touch-and-go pattern. Maybe it is worth a few minutes to review the basics of traffic pattern requirements, midair collision avoidance, and proper pattern etiquette.

High Wings, Low Wings, and the Standard Traffic Pattern

The “Friendly Aviation Administration” is sufficiently concerned about traffic pattern etiquette to have just released an update to Advisory Circular 90-66C, “Non-Towered Airport Flight Operations.” However, this updated AC, the AFH, and Pilot’s Handbook of Aeronautical Knowledge (PHAK) are all quick to point out that the FAA does not regulate traffic pattern entry—only the traffic flow pattern. Thus, all traffic at a nontowered airport is expected to blend into the existing left traffic pattern unless right traffic is specified on the sectional chart or the chart supplement.

However, if we look carefully at the recommended box-shaped general aviation traffic pattern with its series of straight and level legs connected by brief 45- and 90-degree turns, it is designed to nearly eliminate the blind spots associated with both high- and low-wing aircraft. The 45-degree entry leg allows for aircraft entering and those in the pattern to see each other out the side windows while still in level flight. The level downwind and base legs, each separated by 90-degree turns, perform the same function. We might ask, why does the FAA recommend traffic on the crosswind leg turn onto downwind after reaching pattern altitude? Once again, it reduces the risk associated with the high-wing/low-wing blind spot.

Nonstandard Patterns, Blind Spots, and Belly Checks

So, what happens when things do not go strictly to plan? A couple of recent accidents come to mind.

On May 12, 2021, a Cirrus SR22 at Centennial Airport (KAPA) in the Denver suburb of Englewood, Colorado, made what may have been a nearly constant base turn at higher-than-normal pattern speed and literally flew right through the rear upper fuselage of a Fairchild Metroliner on a straight-in approach. Thankfully, the Metroliner landed on the runway, and the Cirrus parachute saved the day for the single.

Then, on July 17, 2022, there was an accident involving a Piper Malibu and a Cessna 172 both operating at North Las Vegas Airport (KVGT). The towered airport has parallel runways: 12R/30L and 12L/30R. The Piper Malibu was making a teardrop-shaped constant left turn to final from midfield, was assigned Runway 30L but appeared to line up on Runway 30R and collided with a Cessna 172 making a right base to final turn to the same runway. All four occupants of the Cessna and Piper were killed. These two accidents highlight a significant visibility limitation inherent in every aircraft. Once we have accounted for the high/low-wing visibility limitation, the remaining blind spot is the belly of our own plane.

• READ MORE: Pro Tips: Situational Awareness For Private Pilots

Our fighter pilot friends can’t see through the floor of their jets either. OK, so the F-35 with its $400,000 pilot helmet actually can, but that’s another story. When a fighter pilot executes a quick descent or a sustained steep turn, a quick roll to the left or right, often called a belly check, allows them to clear this primary blind spot. Fly the pattern too fast, fail to roll out on the base leg, or fly a nonstandard curvilinear turn to the final approach, and you increase your risk of being belly up to other traffic. Follow the recommended pattern etiquette, and you dramatically reduce the chance of a collision.

Another example of mixing curved and box patterns is the overhead pattern. This approach, often used by warbirds, especially in formation, consists of an initial leg at pattern altitude, followed by a 180-degree “pitch out” to the downwind and another 180-degree turn to final. This military pattern is a great method to get fast airplanes, especially in formation, slowed down, separated, and on the ground quickly, notably at a towered airport where the traffic flow can be managed. However, at a nontowered airport it places the airplane turning downwind from the overhead pattern belly up to anyone joining the downwind from the 45-degree leg. The same thing occurs with the curvilinear turn to final.

The moral of the story is that mixing curvilinear and box patterns creates belly blind spots that the designers of the recommended nontowered airport traffic pattern can’t help you with.

The Crosswind Entry Option

Gather any 10 pilots together and ask about the best method for entering the downwind leg crosswind from midfield and watch the arguments begin. The option preferred by the FAA involves crossing the airport at midfield 500 feet above pattern altitude and then making a constant turning descent to join the 45-degree leg to downwind (see AFH Chapter 8, fig. 8-3). This approach makes it easier to blend into traffic.

However, the constant descending turn to the 45-degree entry leg places the pilot belly up to aircraft entering on the 45-degree entry. Sounds like a belly check is in order. The other alternative involves entering a midfield crosswind leg at pattern altitude and then joining the downwind. The plus is that all the traffic is in the pilot’s front and side windows before the turn. The downside is that two aircraft, one turning downwind from the crosswind leg and another on the 45-degree entry, are belly up to each other. Whichever you choose, it is good to understand the plus and minuses of each, and the need to check your belly blind spot for traffic.

Proper Communication Etiquette

There is no requirement to make radio calls in the pattern at a nontowered airport. In fact, NORDO (no radio) airplanes are welcome. Having said that, our friends at the FAA remind us that concise and accurate “self-announcement” is the proper etiquette. The term self-announcement is a reminder that each transmission should announce your position and intentions so that others in the pattern can plan accordingly. The updated advisory circular goes to great pains to drive home a couple of salient points.

First, radio calls should include the type of aircraft and the N-number. Recently, I have noticed pilots substituting the color and type of aircraft for the N-number. I fly at a busy feeder airport that serves at least five flight schools. So, when a pilot transmits “blue-and-white Cessna turning base,” I casually look out the window and note that there are at least five Cessnas that fit that description in the pattern.

Second, the FAA reminds us that the phrase “any traffic in the area, please advise” is a nonstarter. I believe the point it is trying to make is that traffic pattern radio calls are not a conversation. Rather, each “self-announcement,” starting at 8 to 10 miles out and ending when we clear the runway, is for the benefit of the entire pattern to provide a safe environment.

Start Planning Early

Hey, I seem to remember that my CFI asked me to start planning my arrival before takeoff, not 10 miles out! Hmm, I thought the traffic patterns here are all left hand, right? Not so fast. If the letters “RP” are listed below the runway length and elevation on the sectional, then a glance through the chart supplement will reveal right-hand traffic prevails on one or more runways. Preflight is also a great time to catch up on possible noise restrictions, NOTAMs, special instructions, and nearby transmission towers.

I am also an advocate for spending the extra bucks to get ADS-B In as well as ADS-B Out. Having the airport traffic pattern picture on a portable iPad while still 10 miles out is priceless. I tend to use the traffic information to correlate the N-numbers I hear on the radio (no aircraft colors or paint schemes please) with traffic locations. All the while I remember that ADS-B of any kind is not required at Class D or nontowered airports. Once established on the 45 to downwind, your Mark One Eyeballs are the best collision avoidance devices. I transition to 100 percent out the window, but the aural traffic alarm provided by the ADS-B In receiver is good insurance while scanning outside for conflicting traffic.

Keeping the Tower Crew Happy 

What might the tower crews want us to remember? First, some smaller towers have radar and some do not. In either case, it is important to keep your patterns close in and avoid the dreaded “bomber pattern.” What the tower cannot see, it cannot control. Second, at a busy training airport, be ready to go when you call the tower. If given a clearance for an “immediate takeoff, no delay,” the tower expects your wheels to start turning right away. This is not the time to start the pretakeoff checklist. If you are not ready to go, just say so and stay put. Third, keep your radio transmissions informative and brief. If you have a question, please be sure to ask, but beware of the long-drawn-out soliloquies that block the frequency. Fourth, if cleared to land number three, make sure to visually identify both number one and number two. Failure to do so may result in one of those high-wing/low-wing close encounters, or worse, on final approach. Finally, just like at a nontowered airport, be on your guard at all times for traffic. Good traffic pattern etiquette requires teamwork between the tower and pilots.

Be Safe Out There

Greasing on the perfect landing (are we down yet?) is one of the most satisfying parts of flying. Our behavior in the traffic pattern is a reflection of just how professional we are. Just like the jet jocks who clean up their act as they approach the airport traffic pattern, we all have a responsibility to be prepared, know the rules and recommendations, and execute the proper traffic pattern etiquette. Midair collision avoidance is a team sport that requires each of us to know where to be and what to do once we get there. Fly safe!

Editor’s Note: This story originally appeared in the October 2023 issue of Plane & Pilot magazine. 

The post Pro Tips: Traffic Pattern Manners and Etiquette appeared first on Plane & Pilot Magazine.

It is a VFR day, and it sure looks like you have the sky to yourself when suddenly the ADS-B comes alive with “Traffic. 12 o’clock, 2 miles. Same altitude.” You look around frantically but don’t see the other aircraft. Or maybe you’re in cruise flight in what appears to be an empty sky when suddenly you see the traffic off your wing at the same altitude. As you take action to avoid the other aircraft, you wonder why the ADS-B that you paid thousands of dollars for didn’t utter a sound or provide a visual annunciation warning.

Can you relate to these scenarios?

Automatic dependent surveillance-broadcast, or ADS-B, became law in January 2020, ostensibly to make the skies safer—but has it worked? Researchers from Embry-Riddle Aeronautical University are asking pilots to fill out a survey about their use of ADS-B to help determine if and how pilots are using the technology, and if it has helped curtail the number of midair accidents.

“We want to determine how effective ADS-B is in reducing the number of midair collisions in general aviation,” said Douglas Boyd, Ph.D., an adjunct research professor at Embry-Riddle.

Boyd holds several pilot certificates and has more than 1,500 hours of flight time. He and a colleague are studying midairs in hopes of finding a way to mitigate them. According to Boyd, how a pilot uses ADS-B is key.

“Where do they get their annunciations? Is it from the panel or from their iPad? Where is the iPad in the cockpit, and so forth,” Boyd said.

There are 15 questions on the survey, one of which asks how often pilots have received a warning about traffic and not been able to visually acquire it outside the airplane.

“There has been a large number of responses from pilots who experienced this,” saod Boyd.

Some pilots are also surprised to learn that non-ADS-B aircraft will show up on ADS-B some three to 13 seconds after the radar beam sweeps over them, then the pilot receives a traffic advisory from the ADS-B, but it may not be helpful.

“The aircraft can go a long way in those 13 seconds,” said Boyd.

The survey takes about five minutes to complete, and the window to do so will be open until the end of October.

To take the survey, scan the QR code below or visit www.surveymonkey.com/r/PR3GPJS.

The post How Do You Use ADS-B? appeared first on Plane & Pilot Magazine.