Questions tagged [iaps]

Instrument Approach Procedures (IAPs) are procedures used by pilots to maneuver an aircraft by reference to their instruments during an approach, published by the FAA and other third parties (most notably Jeppesen).

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16
votes
3answers
6k views

Why isn't an LPV SBAS approach considered a precision approach according to ICAO?

According to ICAO's classification, LPV SBAS approach is in the APV group, because it doesn't meet some specifications for precision approaches. But what exactly does it not meet? Glossary: LPV: ...
27
votes
3answers
2k views

If there is a misprint on an instrument plate, is a pilot required to comply with it?

This is a snippet from the KESC RNAV 36 approach. It's a real procedure, I didn't photoshop it except to add highlighting. Let's say I was in the position that the blue aircraft is in (roughly 10 ...
13
votes
2answers
2k views

Is there an online source for European Instrument Approach Procedures?

The FAA offers instrument approach procedures on their website free of charge (FAA Charts). Is there a similar site provided by EASA or the EU?
19
votes
7answers
70k views

What is the difference between LNAV/VNAV and LPV minimums on an RNAV approach?

This approach shows two sets of minimums that both have vertical guidance with a Decision Altitude (DA). What is the difference between LNAV/VNAV and LPV, and why does LPV have lower minimums?
15
votes
1answer
6k views

What is a SAAAR / RNP AR instrument approach?

I understand that a SAAAR / RNP AR is a "special" approach and that special approval is required to even get the approach plate, but what exactly is it? Aspen is an example of an airport that has one....
11
votes
1answer
3k views

When conducting a circling approach, how close do you have to stay to the airport (especially with the new FAA requirements)?

I heard that the FAA recently changed how they calculate the protected area for circling approaches, and it looked quite complicated because it changes based on altitude and speed, etc. Can you ...
0
votes
1answer
75 views

Does transition to SBAS or GBAS navigation require alignment of the intermediate segment with final segment?

I am studying how the Satellite Based Augmentation System (SBAS) or the Ground Based Augmentation System (GBAS) affect the Instrument Approach Procedures, and I noticed that in ICAO's Aircraft ...
19
votes
1answer
839 views

Why would an approach be Cat A NA?

I was looking at the RNAV (RNP) 6 approach into Gunnison (KGUC) and noticed something quite strange: If the image isn't clear enough -- the approach is Not Authorized for approach category A aircraft ...
12
votes
5answers
5k views

Are crossing restrictions on an ILS/LOC approach mandatory when flying on the glideslope?

Some "ILS or LOC" approaches have crossing restrictions that are shown before and/or after the final approach fix/glideslope intercept. Are these restrictions for the LOC only approach, or do they ...
16
votes
2answers
2k views

What is a monitored approach?

I've heard this term used to describe approaches into low weather (e.g. category 2 ILS), what is it? How is this different than an ILS approach?
13
votes
3answers
7k views

When flying a circling approach, is it permitted to begin the visual circling segment prior to the final approach fix?

If it were a beautiful sunny VFR day and you were cleared for a circling approach, can you begin the circle prior to the final approach fix/circling DH in order to maneuver visually to land? Here are ...
12
votes
2answers
946 views

Why are sidestep ILS minima not used in EASA-land? (specific example: EGKK)

If you are not aware, London Gatwick (aka EGKK) has a setup with a primary air carrier runway and a backup runway immediately next to it, such that only one runway can be used at a time. The main ...
11
votes
3answers
7k views

Is it legal to fly the localizer approach when cleared for the ILS?

Most ILS approaches include localizer minimums that can be used if the glideslope transmitter or receiver fails. For example: In this case, to fly the ILS you would intercept the glideslope just ...
11
votes
1answer
6k views

When cleared for an approach and not on vectors, is a depicted course reversal always required?

At least where I fly, most instrument approaches now use a Hold In Lieu of Procedure Turn (HILO). The "full procedure" now consists of a turn in the hold before proceeding inbound. In the example ...
8
votes
1answer
7k views

Where to obtain a list of active NDB approaches?

Does anyone know where to find a list of active NDB approaches? I can find a list of ones proposed to be eliminated, but I'm having a problem coming across a list of remaining ones.
6
votes
1answer
4k views

When to go missed on a non-precision approach?

I am training to get my instrument rating and I have come across a confusing point. I understand that, when flying a precision approach, you go missed upon reaching the decision height for that ...
10
votes
2answers
1k views

Why do some back course operations use normal sensing?

So the LOC/DME-E approach to KASE lists for the missed approach course to use the I-PKN localizer, but then there's a note 'course outbound is normal sensing'. Does that mean that in effect, this ...
9
votes
1answer
1k views

Do helicopters fly the same instrument approaches as fixed-wing aircraft?

Do helicopters fly the same instrument approaches as fixed-wing aircraft? If so, which approach category and minimums do they use?
7
votes
1answer
541 views

How do you encode a radial to radial turn in ARINC-424?

I am building my own ATC simulator and for that purpose I need to include several instrument procedures. I have a problem with that particular one: My problem is on KEA transition, the leg between "...
6
votes
2answers
15k views

When should an Obstacle Departure Procedure (ODP) be used?

Buried away in the front matter of the FAA charts is a section titled "IFR TAKEOFF MINIMUMS AND (OBSTACLE) DEPARTURE PROCEDURES". Note that this is not a graphical departure procedure that is in with ...
5
votes
1answer
328 views

Do Jeppesen SIDs have top altitude?

FAA SID charts show the top altitude, the maximum altitude you can climb to when cleared for the SID. Do Jeppesen SID charts also show the top altitude? I checked some of them but couldn't find it. If ...
3
votes
2answers
1k views

What is a “sidestep landing” in an instrument approach?

I have never seen a sidestep landing on an approach plate. What is a sidestep landing and when I can chose this approach?