Questions tagged [instrument-procedures]
Procedures for navigating based on cockpit instruments rather than visual references outside the cockpit.
229
questions
2
votes
1
answer
114
views
In what situations can LNAV/VNAV minima be higher than LNAV minima, such as RNP Approach to Runway 16 in Corfu?
I recently flew the RNP approach for runway 16 into Corfu. While reviewing the approach charts, I noticed something unusual. The LNAV/VNAV minima is set higher than the LNAV minima for this particular ...
- 1,792
0
votes
1
answer
91
views
Why are there altitude differences on the Jeppesen ESB Ankara VOR chart?
What is the reason for the 10 feet difference between ESB dme altitude and profile view? Thanks.
- 101
0
votes
1
answer
81
views
In part91 operations, If I want to use odp, do I need to follow takeoff minimum?
I know there are no take off requirements for part 91.
But if we decide to use an ODP, legally should our airplane be able to make minimum climb rate of takeoff minimums described in the ODP chart?
- 21
1
vote
1
answer
590
views
How do you capture the localizer in an A320?
I understand that pushing 'Approach' should do it (when in range), but it doesn't. There must be another step that I'm missing (the computer has been set up so it's not that).
What is the step-by-step ...
- 12.5k
2
votes
0
answers
107
views
Altitude/Minimum altitude in ARINC 424
Airport SID/STAR/Approach Primary Records in ARINC 424 contains two fields with altitudes: columns 85-89 and columns 90-94. How to interpret if both fields are empty ? What are the altitude ...
- 21
1
vote
4
answers
453
views
When should the missed approach procedure be executed?
When flying a straight-in precision or non-precision instrument approach, when should the missed approach procedure be executed?
Note that this is being asked in the context of FAA regulations, but ...
- 14.8k
4
votes
1
answer
703
views
Are IAPs designed around an average barometric pressure for an airport?
When implementing IAPs, is atmospheric conditions taken into consideration? For example, for any given airport there will be varying atmospheric pressure. This will slightly affect the DH and DA. How ...
- 6,322
4
votes
3
answers
1k
views
What are Baro-Aiding and Baro-VNAV systems?
I've tried searching online as to what the architecture of these systems look like, and I can't seem to find any hardware information. And if it's not a hardware but instead a software, which software ...
- 297
2
votes
1
answer
110
views
Canadian Approach Plates: Why does the minima show that DME is required but the procedure name does not?
I see so many plates that contain lines of minima requiring the use of DME, but the title does not indicate DME is required. For example, the "LOC RWY 27" approach into CYYJ. The title ...
1
vote
0
answers
43
views
RAIM Checks when using GNSS in lieu of DME for distance information
I understand that a RAIM has to be checked on the ground as part of preflight, as well as before the commencement of an RNAV/RNP approach.
What I am unable to find information on online, is whether a ...
- 11
0
votes
0
answers
58
views
Why does the FIX names change frequently for the approach courses for a given airport?
I have seen the name of fixes change as published in the approach plate for airports like DFW, ORD. The approach path seems to be the same. For example, sometime over the last year the FAF for 18L at ...
2
votes
1
answer
528
views
Best way to mentally calculate wind correction angle (WCA) when in a holding pattern?
I have been out of flying for a while and need to brush up on my holding patterns. I need a quick method or rule of thumb to calculate the wind correction angle (WCA) for example when flying outbound ...
8
votes
1
answer
1k
views
Why are most of KBOS's instrument departures and arrivals jet-only?
I was looking through the big book o' KBOS instrument procedures when I noticed that almost all of the airport's SIDs and STARs are marked "NOTE: For turbojets only" or some variation ...
- 28.1k
3
votes
1
answer
131
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 ...
- 297
1
vote
1
answer
261
views
If we are cleared for an ILS approach, can we descend according to the approach chart？
For example VCBI，ILS Z 04. We have ATC clearance:
Descend and maintain 2300 feet, Cleared ILS RWY 04 approach.
Can we descend as profile 1700 and then 1500, and intercept glide path? Or maintain ...
- 51
1
vote
1
answer
107
views
Since which moment do the Low Visibility Procedures apply?
For CAT II and CAT III approaches require that protected area around the ILS antennas is kept clear from obstacles so it does not disrupt the ILS signal.
So when there is an airplane on the final ...
- 56.2k
9
votes
2
answers
737
views
What are the constraints and procedures regarding IMC formation flight?
"Instrument Meteorological Conditions" are those in which flight under Visual Flight Rules is not permitted. This changes based on airspace but for the most part IMC means that flight ...
- 13.4k
1
vote
1
answer
153
views
Glidepath difference
I recently flew an RNAV/LPV instrument approach in IMC. Although out of the clouds by then, I was watching my vertical guidance on my NAV (which was at center) and noticed I was below glideslope for ...
- 341
4
votes
1
answer
250
views
Can I log Simulated Instrument time with a safety pilot if I need an Instrument Proficiency Check?
Can I log Simulated Instrument flight time and instrument approaches with a safety pilot if I need an Instrument Proficiency Check?
I am instrument rated but haven't done my 6 Instrument approaches ...
- 99
4
votes
1
answer
330
views
Why is the distance between BRY VOR and missed approach point 0.2 DME in the plan view, while it is specified as 0.1 DME below?
Why is the distance between BRY VOR and missed approach point 0.2 DME in the plan view, while it is specified as 0.1 DME below? If we consider that the localizer is 0.2 DME ahead of the runway ...
- 2,049
0
votes
1
answer
145
views
Why is the box I marked with a red arrow empty and no class information given?
Why is the box I marked with a red arrow empty and no class information given? On the NDB chart, both places are left blank. Am I supposed to consider the gap "FULL" by reference from the ...
- 2,049
3
votes
2
answers
192
views
Are departure briefing and take-off briefing the same thing? If the same, when is it appropriate to brief?
Are departure briefing and take-off briefing the same thing? If the same, when is it appropriate to brief? (before starting the engine, while taxiing, just before takeoff) I am asking the question as ...
- 2,049
5
votes
1
answer
87
views
KHAF runway 30 ODP in the works, appears to be missing a segment
Asked the FAA about this & they replied that the procedure has been redesigned since the one at the link was posted, that the old charts will be removed from the website, and that the newly ...
7
votes
1
answer
1k
views
What does the letter "H" on the upper side of ADANA word and mean?
As you can see on the STAR chart of Adana, there is a letter "H" with a black background for the VOR sign's line. I can't find the meaning.
- 2,049
1
vote
1
answer
126
views
Is it possible to handle naming duplictates for teminal points in ARINC-424?
In ARINC-424 17 specification, under 7.2.6 Terminal Waypoints subsection A the "Airport/Heliport or Runway/Helipad related Terminal Waypoints" naming ...
- 6,970
0
votes
0
answers
198
views
TruTrak Vision PMA Autopilot Limitations for coupled instrument procedures- C172M - STC SA04231CH
I am currently flying a Cessna 172M with a TruTrak Vision Autopilot installed under STC SA04231CH. Section 2.4 of the approved AFMS states:
This autopilot has not been evaluated by the FAA to meet ...
- 31
2
votes
0
answers
275
views
EASA Part-NCO; Approach light system
EASA Part-NCO, specifically OP.110, refers to 4 different lighting systems (NALS, BALS, IALS, FALS) to be considered when determining the landing minima. However, there are quite a few different ...
- 588
5
votes
4
answers
1k
views
Why is flap retraction done in stages?
After takeoff and upon achieving positive climb, why is flap retraction done in stages?
For example, in the Airbus there are characteristic speeds after which flaps can be retracted (S and F speeds) ...
user64394
13
votes
4
answers
2k
views
Are there any/many US airports (with instrument approaches) still without RNAV approaches?
GPS approaches being so trivially easy to establish and maintain, are there any/many US airports with instrument approaches which do not have at least one RNAV approach?
- 4,893
11
votes
5
answers
3k
views
When should I slow to approach speed?
When do I have to slow to approach speed in order to qualify for a particular category? Specifically, if I want/need cat A minima, what is the exact point at which I need to be at 90 kt (or less)?
I’d ...
- 27.6k
6
votes
2
answers
2k
views
What does "Procedure NA" mean, when applied to a VOR sector?
In the RNAV-A IAP for KGAI there's a note "Procedure NA for arrival on EMI VORTAC airway radials 151 CW 269". It appears that arriving from any airway radial to EMI would have the NoPT (of ...
- 512
5
votes
2
answers
262
views
Why does the surface-level Class E airspace at SIT/PASI (Sitka Alaska) extend so far to the northwest?
The August 1992 Final Rule "Terminal Airspace Reconfiguration" (page 38963, Federal Register Volume 57 No 167, August 27 1992) (link to pdf of entire issue opening to this page) stated that ...
- 21.8k
4
votes
2
answers
861
views
What instrument approaches can be flown with just a single VOR receiver?
I've been getting ready to do a series of streaming sessions on Microsoft Flight Simulator 2020 that demonstrate the extreme limits of IFR capability. With stuff like the G1000, the Cessna 172 will ...
- 3,408
4
votes
2
answers
1k
views
Is baro-VNAV the only possible source of vertical guidance on LNAV/VNAV approach?
As written before, is baro-VNAV the only possible source of vertical guidance on LNAV/VNAV approach? I read somewhere that SBAS is also a possible source, but in that case wouldn’t it be a LPV ...
- 1,953
0
votes
2
answers
142
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 ...
- 21.8k
10
votes
2
answers
3k
views
ILS Approach, when can you descend on the glide path?
The following quote is from G. Bristol’s book, Ace the Technical Piloting Interview:
You can descend on the glide path when
You have been cleared for the ILS procedure.
You have captured the ...
- 1,792
1
vote
3
answers
990
views
Glideslope reliable height and PAPI usage
First of all, which height can we rely on glideslope indication?
From what I know, we can trust and use glideslope to Decision Height, not even below Decision Height.
If we use glideslope even passing ...
- 391
7
votes
3
answers
809
views
Holding entry is counted as a one turn holding?
If I ask ATC 'request direct to ABCDE waypoint and one turn holding', do they expect me to do the teardrop entry or parallel entry if I need to and fly the whole holding pattern after that?
Or ...
- 71
3
votes
1
answer
610
views
Can a Localizer Backcourse signal be reversed (at the site antenna)?
Can the two Localizer Backcourse signals (90Hz and 150 Hz) be reversed (at the site antenna) eliminating reverse needle sensing when flying a Localizer Backcourse approach?
If so, are there any ...
user22445
12
votes
5
answers
2k
views
What specific hazard is the practice of identifying an ILS LOC by Morse code trying to prevent?
This question got me wondering about the practice of tuning a navigation frequency, selecting it on the audio panel, and then identifying it by listening to the three letter Morse code signal.
I know ...
- 24.8k
5
votes
2
answers
2k
views
If RVR equipment is inoperative what visibility should be used for an approach where the RVR minimum is 1800 ft?
At KSLC (Salt Lake City International Airport) the ILS minimum RVR for runway 34L is 1800 ft. If the RVR equipment is inoperative and RVR is not reported how do you determine the minimum visibility ...
user22445
5
votes
2
answers
4k
views
What is the best way to determine wind correction angle?
As a new instrument student, I would like to know the best and efficient way to determine a rough wind correction angle. Calculating it with help of the e6b or other ways is often good to do before ...
- 742
4
votes
1
answer
3k
views
Are there any U.S. airports that offer GCA (PAR/ASR) approaches?
Are there any U.S. Civilian or Joint-Use (military/civilian) airports that currently offer either/both a PAR (Precision Approach Radar) or an ASR (Airport Surveillance Radar) Ground Controlled ...
user22445
3
votes
2
answers
3k
views
As a private, non-instrument rated pilot, can I log an instrument approach with a CFI (not a CFII) on board?
I’m a US based private pilot building time toward the instrument rating. A CFI flies with me as safety pilot for simulated instrument conditions. They are not a CFII yet. If I fly a XC under the hood ...
- 31
2
votes
2
answers
295
views
For KPDX LOC 21 approach, how is the procedure turn performed when entering from the east?
On the Portland, Oregon Loc 21 approach....
Let's say I was east at CARBY (not shown) and traveling on a northwest heading to CREAK (about 280 or so). CREAK is on the approach plate and an IAF/IF. I ...
3
votes
0
answers
258
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.
9
votes
2
answers
4k
views
What should I do if I intercept the glideslope before reaching the final approach fix?
On several of the ILS and RNAV LPV approaches in my area (and notably the ones I expect for my checkride), I consistently intercept the GS at 0.1-0.2nm before the FAF.
An example: I am flying at ...
- 27.6k
1
vote
0
answers
404
views
All approaches at airport NA for Alternate planning. Does that mean the same as Airport NA for Alternate if VFR landing is planned?
Jeppesen will use the term "NA" in the "For Filing as Alternate" table if all the available approaches at the given airport are not available. For FAA charts, a pilot will know ...
- 11
3
votes
3
answers
348
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 ...
5
votes
2
answers
170
views
Where a Contact Approach is conducted there must be a published Instrument Approach to that airport. Why is this?
The following is required in order for a pilot to conduct a "Contact Approach:"
Pilot must request it from ATC;
Reported ground visibility must be at least one mile;
The pilot must remain ...
user22445