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Questions tagged [procedure-design]

For questions relating to the design of departure and approach procedures

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4 votes
2 answers
352 views

If an Airport has only a VCOA and a SID, does the VCOA count as an ODP, and if not, does that mean you can fly a diverse departure?

KGRF has a SID requiring a climb gradient of 469 FPNM for obstacles. In the takeoff minimums section, there are takeoff minimums listed for a VOCA (Visual Climb Over Airport) but nothing else. My ...
3 votes
1 answer
182 views

Why does ATC assign a SID and then give different instructions after takeoff?

I have had many occasions at different airports flying a small single engine piston aircraft out of a Charlie or Delta and they will assign the SID, but give different instructions upon getting ...
0 votes
0 answers
186 views

Which values do "PANS-OPS" and "Standard" labels represent in the minimum table seperately? (minimums, circle-to-land values, aircraft categories...)

What is the difference between these two labels and which values do they represent in the minimum table exactly? ("PANS-OPS" and "Standard") What are the values that Standard and ...
1 vote
0 answers
70 views

What factors determine the DA(DH) and RVR/VIS of an ILS approach?

Look at the jeppesen chart of “VCBI-ILS Z Rwy 04 ”. why the DAs are more than 200+RwyElev,and RVRs are more than 550m, What factors determine the DA(DH) and RVR/VIS of an ILS approach?
0 votes
1 answer
420 views

Flying an RNAV SID with instructions to intercept a course to a waypoint

Looking at the OZZIE FOUR departure off APC (first page shown) the instructions are, e.g., TAKEOFF RUNWAY 19L: Climb on heading 186° to intercept course 269° to KLARK, then on track 342° to FIRTO at ...
0 votes
2 answers
145 views

Generally speaking, which assumes a greater (steeper) minimum climb or descent angle – approach procedures or departure procedures?

Generally speaking, which assumes a greater (steeper) minimum climb or descent angle – approach procedures or departure procedures? Which would typically require a larger extent of airspace protected ...
3 votes
0 answers
344 views

Why would an airport have a "Z" approach unless there's also a "Y" of the same type?

Napa Airport (KAPC) has an ILS Z 1 approach, but no ILS Y 1. See here. Why isn't this just the ILS 1? The naming rule described in the IPH, referenced here, doesn't explain why this would happen.
7 votes
1 answer
2k views

What is the difference between a conventional and an RNAV holding?

While reading in the PANS-OPS (Doc 8168-OPS/611 Volume II) about holding procedures, I came across Chapter 7 of Part III section 3 defining RNAV holding procedures ...
3 votes
3 answers
372 views

Is flying direct to a navaid considered a leg with track guidance?

When I design SID or Missed approach procedure with a typical sequence of initial legs like "Climb to 5000 feet on R-123 ABC VOR/DME, turn left/right direct to ABC VOR/DME", the regulation ...
2 votes
1 answer
503 views

Based on PANS-OPS, what is the earliest turning point that can be used in a missed approach?

I am studying ICAO's PANS-OPS 8168 manual, and I have noticed conflicting guidelines regarding the permitted earliest turning point during a missed approach. In section 6.2.1.1, it clearly states: ...
1 vote
2 answers
103 views

How do designers determine the altitude profiles of neighboring procedures for deconfliction purposes?

I am interested in studying ICAO's Continuous Climb Operations design strategy, however I have some trouble understanding how the procedure designers take into consideration the traffic flow from ...
1 vote
1 answer
235 views

During an LPV or GLS final approach, can the extension of the aircraft's cross-section line intersect with the Y or X OCS surfaces?

I am studying Obstacle Clearance Surface construction using FAA's Performance Base Navigation manual 8260.58B as my guide. I am confused about the rules concerning aircraft's permitted altitude in ...
8 votes
5 answers
4k views

How much do you have to respect checklist order?

In a fighter aircraft, if the checklist says turn on the radar then turn on the Heads Down Display, and the pilot turns on the HDD first would he be reprimanded for that if it makes no difference? Is ...
1 vote
1 answer
132 views

At what point of the design process the manufactures build their first prototype?

I would like to know when the aircraft manufactures decide to put in practice their designs building the first scaled prototype (or maybe the actual size). Does the design have to accomplish a list of ...
0 votes
1 answer
482 views

What is implied about altitude and the VDP by this Visual Flight Segment arrow in the profile view example in the Aeronautical Chart User's Guide?

This is out of the Aeronautical Chart User's Guide. The arrow for the visual segment is depicted as being level flight. Is that what is intended to be conveyed? If so, how would you know what ...
1 vote
1 answer
847 views

What is the visual manoeuvring area (circling approach) radius for PANS-Ops (ICAO)?

I'm very confused of the actual radius of the "protected area" in a circling approach for a PAN-OPS approach plate. The ICAO doc 8168 contains information for circling approach at 1 000 ft. But what ...
1 vote
0 answers
68 views

Is there a database from which I can retrieve the Expected Crossing Altitudes of a Departure or Arrival Procedure?

I am stuyding FAA's Coded Instrument Flight Procedures (CIFP) file which uses ARINC 424 digital format to code its data. I noticed that only mandatory crossing altitudes and speeds are included in the ...
15 votes
2 answers
4k views

Why is the missed-approach course for the "RNAV (GNSS) - A" approach to runway 28 at ENSB shaped all funny?

Svalbard-Longyear (ENSB) has one particular approach (the RNAV (GNSS) - A approach to runway 28) whose missed-approach course is... oddly-shaped, to say the least: (PDF by Avinor; screenshot and ...
2 votes
2 answers
297 views

What is the operational advantage of starting an RNAV SID with a VI-CF leg combination?

I am examining Standard Instrument Flight Procedures, mainly from FAA's charts and Coded Instrument Flight Procedures ARINC-424 file (CIFP). I am keen in understanding the operational advantages or ...
2 votes
0 answers
137 views

How do procedure designers calculate Minimum Enroute Altitudes?

When the designers of instrument flight procedures design a new procedure, I understand that they use certain manuals, such as ICAO's Doc29 or FAA's TERPS and PBN (8260.58), in order to construct ...