Radius to Fix | GPS Leg Types on Approaches

[@AK-xe2ly]

Heads up, Looks like a video issue at 1:00 - love your videos.

[@flightinsight9111]

Yes looks like about 15 seconds dropped out. Sorry all!

[@Steezington]

@@flightinsight9111 I still learned a lot! You're forgiven

[@cha05]

a fun academic exercise. but to be frank, sometimes it’s safer to forego a rare procedure like this one and “simply” request vectors. by all means, if you’re proficient and you have the nav (and AP) to fly the approach in a stabilized manner, do it. but if you are single pilot IFR seeing this for the first time in the air, don’t try to convince yourself you can do it just because you watched a video online. as a corollary, don’t let ATC pressure you into accepting an approach you’re unsure you can ace. keep it simple and fly what you’ve practiced. and remember - unless you’re min fuel, you can always divert to a field with “better-for-you” approaches if you need to. you are PIC, you make the decisions. shoot this sort of approach with a CFII on board who can help you level up.

[@JustSayN2O]

I am very glad this type of approach was NOT on my IFR checkride or the oral portion because frankly I've never heard of it before, until just now !

[@collincampbell9469]

You and your aircraft have to be certified to fly them so that would be evil if ur DPE would bring it up on ur oral

[@Kevlux86]

The fact that you weren’t even aware of them through your IFR training should make you RUN back to the books and figure out all your CFII left out. 🚩🚩🚩

[@JustSayN2O]

@@Kevlux86 My book was the Kings School course. This arcane approach is not described within that course.

[@Kevlux86]

@not arcane. It’s literally in the FAA’s Instrument Procedures Handbook, especially see pg 4-12. If the person giving you dual instruction and/or the person who signed you off for the checkride didn’t have you read that whole thing, plus all the other FAA handbooks/docs for instrument flying, they were slacking. I was asked about RNP approaches vs RNP the general term (which you should also thoroughly know) on my checkride. Everything in those handbooks is fair game for the DPE 😬

[@JustSayN2O]

@@Kevlux86 everybody's a slacker but you

[@johnopalko5223]

That was an eye opener! I had never seen an approach like that in my life. I've seen DME arcs, of course, but never an RNAV arc around an invisible point.

[@chrisk4056]

Awesome. This is exciting me learn more IFR in Flight Sim. I just did the basic lessons in game, now I need to start watching youtube on how the tech works and the g1000

[@williamk5998]

I'll have to try to load this on either my Garmin GPS 175 or the simulator and see if it's available. Thanks for helping me stay current with these less common approach nuances.

[@stevekirk8546]

You make great videos explaining these sorts of procedures - hats off to you. I've come across trainee pilots who loved flying but just couldn't cope with the procedural and communication requirements that are required in many countries. I only fly in simmulation and mostly in Papua New Guineau where the flying is mostly very hard but the ATC rules are easier.

[@BruceAirFlying]

If you fly with most Garmin units, including the newer versions of the G1000, the AFMS and/or pilot guides typically include the following limitations on flying RF legs in light GA aircraft that are not approved to fly Authorization Required procedures: Aircraft is limited to 180 KIAS while on the RF leg RF legs are limited to RNP 1 procedures. RNP AR and RNP

[@EricaCalman]

[@ChevyJay283]

It is an available approach for the Avidyne IFD 540!

[@s_m_v]

What's with the blank screen from 0:57 to 1:14?

[@Flywith_los]

which flight sim are you using to simulate all of this? I'm in the middle of IFR training and looking to buy a flight sim like this to practice

[@philipmcbride-pilotengineer]

If you're nav system can select the X version of the approach, how do you have that particular version in your IFR plan and/or tell ATC you want that version? E.g., they give you vectors and not knowing otherwise, assume you need the Y version?

[@shockwave538]

You don’t put approaches in the flight plan, just airports, airways, and waypoints. You will be assigned an approach, but can usually request a specific one while farther out. This demonstrated reviewing the available approaches in advance and determining what would be the best one for your situation. ATC will know some of your capabilities based on info in the flight plan, but not what you’re personally capable of. You should know what approaches you can handle at your destination before taking off, and if possible what to expect based on forecast weather.

[@philipmcbride-pilotengineer]

@@shockwave538 Great explanation, thanks.

[@antiquehealbot6543]

Where can I find which approach is doable and which is not with your GPS? I tried my best to find those but wasn't able to find any. G1000 Nxi and C172SP POH did not have any information. Especially RNAV RNP was impossible to find.

[@cha05]

the nav database for your unit. i.e. whichever approaches the nav unit displays as options to load.

[@antiquehealbot6543]

@cha05 That's not a real answer. You need to know NAV performance to file IFR flightplan as well. Foreflight has good guidance but it's not an official document.

[@cha05]

the answer to your question “Where can I find which approach is doable and which is not with your GPS” is still “what your nav unit says it can load”. no document will have that information, it is determined entirely by the nav unit, its firmware, and the nav database currently loaded. but it sounds like you’re asking a different question: “what do i and my aircraft need in order to fly this approach” the short answer, as with all IFR flying, is “you better know what you’re doing and be equipped and trained for it”. here is the long answer: there is no difference in the ICAO PBN codes you would file for this approach. while RF leg navigation falls under the set of A-RNP navigator capabilities, we GA pilots are prohibited from filing the more-specific RNP ICAO codes in our flight plan without additional authorization (LOA) since we (as pilot/operators) don’t meet the training/authorization requirements to fly those RNP AR approaches that strictly require RNP. rather, this approach is saying “IF your navigator is A-RNP capable (i.e. can navigate RF legs) then you MAY fly that segment of the approach (despite you/your aircraft not being formally RNP-authorized)”. the only requirement for this approach is RF navigation, and that’s only if you intend to fly the RF feeder leg. notably, a non-AR RNP approach must be navigable to the final approach course WITHOUT RF (ie via vectors or alternate feeders) otherwise it would become an RNP AR approach and we would not be able to fly it. that is why we can plan to fly this approach despite not meeting RNP authorization criteria, and thus there is no difference in the PBN codes we would file. it’s just what you file normally for RNAV capability. in fact, filing something like T1 would be illegal without obtaining a LOA. this is a pretty deep rabbit hole - see AC 90-105A for the nav certification requirements. manufacturers like garmin publish additional guidance, see their “Garmin Performance-Based Navigation Capabilities” PDF for the high level (you’ll see it talks about firmware versions which enable the functionality). if you want the deep specifics, i.e. what YOU need in YOUR airplane to fly THIS approach: the answer is in the manufacturer’s STC, i.e. garmin’s GTN STC 190-01007-A5. in there you’ll find interesting restrictions, such as requiring a flight director or AP to fly the RF leg - can’t just do it on the CDI like usual. bruce air has a good summary, see “RNP Procedures and Typical Part 91 Pilots” and “Garmin GTN Avionics and RF Legs” articles.

[@antiquehealbot6543]

@cha05 Wow, thanks for the high-quality information. As a CFII, whenever my student asks 'Can we shoot this approach' and go for very natural follow-up question of 'Where can we find it' was somewhat insufficient. Thanks for the great detail.

[@cha05]

no problem ^_^ from one CFII to the other, we’re all in this together!

[@vindaniell1111]

Also in the approach notes it says "DME/DME RNP-0.3 NA". Can you clarify what they mean by this?

[@davidfarmerracing]

we need examples/list o Radius to Fix approaches....my GTN650 has them so would be much easier than a DME-Arc as we lose more and more VOR's etc

[@MRNO2]

Hello, I was wondering if you could do a Video or if there is a Video explaining the wind cones and How they work. Now i understand how they work but still struggling on how to number the runways if there isn’t one. Since there is no number. Like if the wind blows south-west i should land on Runways 09 -27. How do i figure out the runways numbers.. It’s hard to explain but would be much help. Thanks

[@s_m_v]

How to figure out runway numbers? _USUALLY*_ you take the runway's magnetic "heading", round to the nearest 10° value, then lop off the zero on the right. A runway with a "heading" of 193°M becomes 190 then 19. That runway would be 19. It gets a little more complicated when there are multiple runways with the same "heading". Then you either end up with a Left, Center, and Right runways (Like in Seattle where you have a 34L/16R, 34C/16C, & 34R/16L), or sometimes they "rotate" the number when they add a new parallel runway (like in Bozeman, MT where they already had a runway with the numbers 12/30 and when they added a new runway, they made the new runway 11/29. * I say _"USUALLY"_ because the magnetic heading changes over time and they can be very slow in updating runway numbers to account for the changed magnetic heading.

[@MRNO2]

@@s_m_v So i Should Memorize the magnetic compass And figure out the Numbers from there? On the knowledge test.

[@shockwave538]

@@MRNO2 You should know at a minimum what compass headings N-S-E-W are. NE-SE-etc would also be good. So if the test says the wind is from the NW and the runways are 26/8 then you’ll know the wind best aligns with runway 26. Just visualize the compass with the 4 main numbers on it.

[@MRNO2]

@@shockwave538 Much Appreciated, Mate.

[@mytech6779]

@@MRNO2 If you are having this much trouble with runway numbers and compass degrees you should pay a certified instructor for an hour or two of one on one tutoring.(Maybe you need a different instructor that has a new way of explaining it, I don't know anything about your situation.)

[@Decent_GameplayBG]

Wow

[@LRobichauxIV]

Dan rocks!