Questions tagged [ifr-navigation]
Questions about navigating under Instrument Flight Rules
0
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3answers
144 views
Why is it necessary to fly in visual conditions to certain unmanned airstrips?
I have come across certain unmanned airstrips where only VFR flight is allowed not IFR? I wonder what can be the possible reasons for that?
4
votes
1answer
89 views
Is the “auto-routing” created by online flight planning resources preferred by ATC over Direct routing when NO preferred route exists?
I noticed that when I use online flight planning resources, they provide an "auto-routing" option for my flight. I also noticed that they are the same between both services so it seems like both are ...
2
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1answer
119 views
Is it ever allowed to list your destination airport as the IFR alternate too? [duplicate]
Is it legal (in certain conditions) to have your primary airport of intended landing, also listed as the alternate?
4
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1answer
268 views
Why do TACANs not have a symbol for compulsory reporting on IFR Enroute Low Altitude charts?
I am studying the IFR Enroute Low Altitude legend, and I noticed that all NAV Aids other than TACAN have a compulsory reporting point icon.
Edit: Plot twist:
They do appear on the STAR/DP legend.
...
2
votes
2answers
112 views
Is it possible to fly VFR above the IMC floor or VFR-On-Top without a specifically filed route, both using an IFR flight plan to go through IMC?
*Note, I'm not trying to recommend this, but I am curious if it can be done.
In this question, Steve V.'s answer made me wonder about this:
One time during my commercial training, my instructor and ...
2
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0answers
20 views
Does a Navigation Specification characterize all legs of a terminal procedure?
I am studying the different parts of Instrument Flight Procedures, as they are described by FAA's manuals, such as the Aeronautical Information Manual, TERPS and Performance Based Navigation. For ...
2
votes
1answer
262 views
What is difference between TAA and MSA?
I know the 'TAA' usually used in RNAV chart, but sometimes it can be used in ILS chart as well. (When defining an IF, GPS is solely methods)
but While I'm studying, I can't find exact difference ...
0
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1answer
82 views
Are there any non-bureaucratic hurdles preventing more widespread adoption of synthetic vision?
Occasionally, a flight will encounter bad enough weather that the crew will become disoriented. While tools like a terrain radar, ILS, and GPWS/TAWS do help the pilots regain orientation, they're not ...
2
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2answers
100 views
How to interpret/use “Fix Minimums” (at KALB)
This one stumped both myself and my CFI. Im specifically asking about the minimums at KALB IL/LOC 19 but a general answer is also appreciated.
The plate lists two distinct sets of minimums and we ...
5
votes
2answers
198 views
Why do planes above FL290 need more vertical spacing?
At altitudes no higher than 29,000 feet, planes need only 1,000 feet of vertical separation.
However, planes over FL290 need twice that, i.e. they need 2,000 feet of vertical spacing between them and ...
5
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0answers
76 views
Which airspace requires what RNP?
How do I know which airspace requires what RNP value? More specifically, can I go from NY to London with just BRNAV providing I stay above the NAT HLA?
1
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2answers
232 views
What does ''NAV ILS OUT OF SERVICE'' mean?
Just curious about the NOTAM below:
!SMF 01/045 (KSMF A0080/19) SMF NAV ILS RWY 16L OUT OF SERVICE
1901180419-1901262359
Does that mean only the glideslope is broken so we can still do a LOC ...
0
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3answers
246 views
How can I use an ADS-B receiver to make my aircraft visible in Flightradar24?
I recently bought a SENTRY ADS-B receiver for the aircraft in order to track the flight.
How could I make Flightradar24 or Flightaware show my aircraft and how to register my aircraft on the website?
2
votes
1answer
112 views
How much difference in heading/bearing between consecutive legs is “officially” considered a turn?
While examining FAA's TERPS manual (Order 8260.3D) and PBN manual (Order 8260.58A), I noticed two seemingly contradictory statements.
TERPS 8260.3D Chapter 14. Departure Routes, 14-3-4 . Construct ...
1
vote
1answer
360 views
Does ATC prefer ILS over RNAV?
Listening to APP for several major (US class B) airports, it seems that every flight is vectored to intercept the localizer. Is it really possible that 100% of flights filed an ILS approach? If so, ...
0
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2answers
128 views
Can only victor way be used for route in cross country?
In IFR low-en route chart, there are many ways related to victor ways. Do I have to select the route for cross county? Or, Can I choose the ways between victor ways?
0
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1answer
153 views
Substitute Suitable RNAV system for Inop Radar on approach “requiring” Radar
Assuming my aircraft's navigation equipment is a "Qualified/Suitable RNAV System," as defined by AC 90-108, is it legal for me to fly the LDA Y Rwy 19 IAP to DCA with ATC Radar out of service?
Here ...
1
vote
2answers
118 views
What does LNAV engagement exactly mean?
I notice the term LNAV engagement being frequently mentioned in aviation related discussions or in several FAA's relevant material. Take, for example, this quote from Order 8260.58A (PBN Instrument ...
6
votes
2answers
433 views
What is the width of a high altitude airway?
Victor airways (airways that are below 18,000 ft) has a width of 8 NM. How about those airways that operates higher than 18,000 ft, do they have specific width you must be in?
Or is there no width ...
0
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0answers
54 views
Can I find the minimum IFR altitude based only on a SID plate?
I noticed this question here on aviation stackexchange, and I was wondering if there is a way to deduce the minimum IFR altitude (either 1000ft or 2000ft above obstacles, depending on whether or not ...
0
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1answer
251 views
What is the type of a SID that is neither RNAV nor RNP?
I am studying FAA's Order 8260.46F and I have noticed that, as far as the different types of SIDs are concerned, it states:
[3-5] (1) “RNAV 1” will be the default designation for RNAV DPs. Annotate ...
1
vote
3answers
1k views
What does it mean when your destination airport is currently “below IFR minimums”?
Does it mean that absolutely nobody can land there until conditions improve? Can ATC still give you an IFR clearance to your destination airport in this case?
20
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1answer
2k views
What means of navigation did commercial Soviet airplanes use in the 50s-90s?
Nowadays, practically all Western commercial airplanes use some kind of GNSS/GPS as primary means of navigation, sometimes paired with inertial navigation systems and user-friendly computer interfaces ...
5
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2answers
7k views
What is the difference between RNAV and RNP?
What is the difference between RNAV and RNP? I know that RNAV doesn't need monitoring and alerting, but RNP does.
1
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1answer
332 views
How to select a SID during the planning stage?
During the planning stage of an IFR flight how to choose the correct SID for your route in an airport with multiple runways and multiple SIDs? and how to predict the runway you will be going to use?
2
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1answer
1k views
How do I fill the PBN\ part in a Flight Plan Form?
Flight Plan Form Section 10 is the "Equipment" section, where one input whatever navigation or communication equipment on board. In addition, Section 18 is the "Other information" section, where you ...
-5
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0answers
61 views
List of desired Games for a moving platform [closed]
Our company, which develops new ideas in gaming, have developed a moving platform with 2 degrees of freedom called Cheeta.
This platform can thoroughly rotate along pitch and roll axis; thus, it gives ...
3
votes
2answers
332 views
Could a pilot navigate using distances and radials from an RNAV waypoint, similar to VOR navigation?
I know that typically RNAV navigation involves a list of waypoints, and the aircraft simply flies from one point to the next. What I'm curious about is if a procedure could be developed (as a special ...
10
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3answers
3k views
Is it possible for a civilian to use a VORTAC station?
Suppose you have a Cessna 208 Grand Caravan Amphibian and you want to use VORTAC stations on military bases (or somewhere else). Is it possible? Is it legal?
3
votes
1answer
2k views
What are the lateral sensitivities of GPS approaches?
What are the lateral sensitivities of each of the WAAS and LNAV approach? Is the lateral sensitivity of WAAS the same as that of the localizer, which is 3 to 6 degrees? What about the LNAV approach?
10
votes
1answer
613 views
What does a 10nm/20nm circle on instrument approach charts mean?
A lot of instrument aproach charts (VOR or ILS) have a circle around the navaid. It can be 10/20 NM or in km, like the 20km circle in the image. What does this circle mean?
4
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1answer
309 views
Why is there a GPS/RNAV waypoint co-located with a VOR?
There is an RNAV waypoint named STYCK co-located at what appears to be the exact location of the LOA VOR (coordinates match precisely as well). Why would the creation of a waypoint be necessary if IFR ...
6
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1answer
404 views
On an inverted aircraft, is the ILS glide slope sensing reversed?
If I'm halfway through a barrel roll on final descent, on an ILS, will I get reverse sensing on my glide slope indicator?
5
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1answer
245 views
When would these two fixes at KMEM be used?
When flying IFR into a class B airport you usually file a STAR at the end of your plan. After the last fix on the STAR you will then receive vectors from ATC to the approach for the assigned runway. ...
5
votes
1answer
2k views
Why are there GPS MOCAs?
The Pilot Controller Glossary (and other places) define MOCAs as:
MINIMUM OBSTRUCTION CLEARANCE ALTITUDE (MOCA)− The lowest published
altitude in effect between radio fixes on VOR airways, off-...
3
votes
1answer
592 views
Do GA IFR flights out of airports w/ SIDs typically use them? What about STARs?
Besides the IAPs (which as an IFR flight you're guaranteed to use unless cleared for the visual), there are the STARs and SIDs, and using them in slow GA aircraft doesn't fully make sense to me.
For ...
11
votes
2answers
789 views
How does Jeppesen create its US charts?
The Jeppesen and FAA IFR plates represent the same information in different ways. The FAA publishes its charts for free, but the underlying data that goes into the charts (e.g., exact coordinates of ...
0
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1answer
2k views
What's is the difference among ECL, CFL, RFL, TFL messages in ATM?
These are several messages to provide a change level during air navigation. Some are sent or requested by the pilot, others by the air traffic controllers, etc. There are subtle differences. Could ...
5
votes
1answer
453 views
Is there a roadmap to satellite / inertial only based navigation?
GNSS is the most accurate mean of navigation available on the flight deck but it relies on satellite being available and under control. Inertial systems are autonomous, but far less accurate.
...
13
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1answer
875 views
Why publish an unusable airway?
If an airway is marked unusable, why publish it?
Secondary question, can RNAV still be used?
13
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1answer
965 views
What are those 5-character alphanumeric waypoints?
On the following High IFR chart from skyvector.com I notice along the meridian at 30' intervals there is a green symbol the same shape as an RNAV waypoint. Next to them are 5-digit identifiers, but it ...
2
votes
0answers
179 views
Why do IFR reporting points have odd names? [duplicate]
I was checking out some flights on FlightAware and went onto the "Route" page for a flight and I saw these IFR Reporting Points with really odd names. Is there a regulatory reason why they have such ...
6
votes
2answers
4k views
What is the difference between fixes and waypoints on an arrival plate?
This is a followup to my other question on this topic. Figured I'd just make it a whole separate question.
The plates below show STAR arrivals to KMEM. The points along the route are marked with two ...
24
votes
9answers
4k views
Can you fly a glider in a cloud on primary instruments?
Assume you enter a cloud with no visibility of the horizon. Your glider is not equipped with an artificial horizon, turn speed indicator or the like.
You must fly within safe limits, using air speed, ...
5
votes
1answer
299 views
Can a view limiting device be used in an aircraft requiring two pilots?
Can a pilot use a VLD for IFR currency if the aircraft requires two pilots? Can it be used while carrying passengers? If so, is this ever done?
I'm thinking of part 121 airline pilots under FAA.
4
votes
1answer
572 views
When an alternate minimum applies, does it change MDA or DA?
In US, the weather minimums for an alternate airport are typically 600-2 for precision approaches and 800-2 for non-precision approaches at ETA, unless otherwise specified at US Terminal Procedure ...
9
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2answers
195 views
Does an amended shortcut clearance change the clearance limit?
A typical IFR cleared route is like,
KABC VOR1 V12 VOR2 V23 VOR3 V34 VOR4 KXYZ
Suppose the verbal ATC clearance is "N7890, you are cleared to KXYZ airport, KABC.ZYBUD departure, radar vector VOR1, ...
7
votes
2answers
598 views
Why does this Garmin GMA340 have an Airway/Inner marker indicator?
On this Garmin GMA 340:
the outer marker is blue and is designated O
the middle mark is amber and is designated M
the inner marker is white and is designated A and placed on the far left.
I looked ...
10
votes
1answer
2k views
What exactly is tower enroute control? Is this similar to 'preferred routes'?
I am reading about 'Tower Enroute Control' and I saw this on wikipedia "Tower en-route control is a collection of published low-altitude, short-distance IFR routes through large metropolitan areas ...
8
votes
1answer
708 views
Does altimeter setting affect the vertical guidance in a LPV approach?
I had assumed during a WAAS approach when the GPS is in LPV mode, both lateral guidance and vertical guidance are generated from GPS/WAAS signals and the pitot-static system should have no effect on ...
