24
votes
Why is the missed-approach course for the "RNAV (GNSS) - A" approach to runway 28 at ENSB shaped all funny?
If you look at satellite imagery it looks like you have very high terrain to the west of the runway. The water would be the primary area available for a climb back to obstacle clearance altitude. ...
- 340
18
votes
How much do you have to respect checklist order?
Yes, the published sequence must be respected. Here is a quote from published instructions on checklist usage by one of the major manufacturers based in the USA:
". . . . The crew may need to ...
- 1,625
13
votes
Accepted
Why is the missed-approach course for the "RNAV (GNSS) - A" approach to runway 28 at ENSB shaped all funny?
As Alexander already said in his answer, the turns over water are executed to gain enough altitude before turning back over the terrain.
(left: RNAV-A, right: RNAV approach chart).
The difference ...
- 58.3k
11
votes
How much do you have to respect checklist order?
I can only speak to the FAA but they expect you to follow the order that checklists are written in as per AC120-71B they also expect checklists to be created in a logical order:
4.2 Organization.
4.2....
- 102k
11
votes
Accepted
How much do you have to respect checklist order?
There is some good advice on proper checklist usage in the answers given. Like FAA and civilian aircraft manufacturers, the military preaches disciplined and proper usage of checklists.
For the sake ...
- 27.3k
9
votes
How much do you have to respect checklist order?
On your PC, do you press the power button before it is plugged into the wall?
It is written that way because the thing might not work if you do it in the wrong order.
Your example of RADAR first and ...
- 9,871
6
votes
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?
Edited based on new information…
I communicated with both the procedure designer for Gray AAF and with the FAA’s Flight Standards office. There are 2 answers for this question:
First, the VCOA at Gray ...
- 553
6
votes
Is flying direct to a navaid considered a leg with track guidance?
I see that if a specific course is not required, the aircraft will turn direct to the navaid on any course which is suitable with its performance. But the aircraft always have track guidance regarding ...
- 27.3k
5
votes
What is the difference between a conventional and an RNAV holding?
A conventional hold based on legacy radio-navigation required overflying the hold fix on entry as guidance is only available inbound to the fix and your exact position is known at the fix (with some ...
- 20.2k
5
votes
Accepted
Why is cold temperature correction not applied from FAF to MAPt on RNP approaches using LNAV/VNAV minima?
They are not applied because the allowed temperature range is included in procedure design. That means the Final Approach Segment (FAS) is protected down to what is called the Promulgated Minimum ...
- 4,382
4
votes
Accepted
Why does ATC assign a SID and then give different instructions after takeoff?
A SID, among other things, is a tool to ease ATC coordinations for departing traffic. For airports with established SIDs, it is common for the tower to be allowed to depart aircraft on the established ...
- 37k
3
votes
How much do you have to respect checklist order?
It depends, in some cases there's a specific order that must be followed in order for things to work or for a safety reason.
If you look at the checklist for a PA-28 it says (among other things) to ...
- 54.4k
3
votes
How do designers determine the altitude profiles of neighboring procedures for deconfliction purposes?
I have some trouble understanding how the procedure designers take into consideration the traffic flow from neighboring arrival procedures
We don't.
We only concern ourselves with terrain and ...
- 41
2
votes
Accepted
How do designers determine the altitude profiles of neighboring procedures for deconfliction purposes?
In terminal areas with relatively low traffic levels, it may be simpler for ATC to let each flight climb or descend at their discretion, with verbal restrictions when an actual conflict appears. There ...
- 27.9k
2
votes
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?
The OCS is the edge of the safe flight 'corridor.' It defines a safe volume of airspace for the approach. Since it's normal to have obstacles off to the side of the approach path the OCS typically ...
- 20.2k
2
votes
Why is cold temperature correction not applied from FAF to MAPt on RNP approaches using LNAV/VNAV minima?
This sounds like you are flying a compensated baro VNAV approach, where the FMC provides compensation for temperature effects automatically and therefore does not require the pilot to correct ...
- 58.3k
2
votes
Accepted
Flying an RNAV SID with instructions to intercept a course to a waypoint
Depending on your aircraft equipment, when you load a SID, as STAR, or any route, (whether manually or from a database) all the legs will simply be there. You may review them in map mode if you have ...
- 27.3k
1
vote
Accepted
Generally speaking, which assumes a greater (steeper) minimum climb or descent angle – approach procedures or departure procedures?
The descent is usually steeper, except in mountainous areas.
The standard descent angle is 3°, or about 300 feet per mile. Very few approaches are steeper than this; designers prefer to alter the ...
- 27.9k
1
vote
Is flying direct to a navaid considered a leg with track guidance?
On a direct-to (DF), there is no track guidance. Any deviation from the line between the original initiation point and the target fix / beacon, will not be corrected for. The aircraft is just steered ...
- 84.5k
1
vote
Is flying direct to a navaid considered a leg with track guidance?
The problem with “turn direct” is that depending on the aircraft speed and the wind speed/direction, the ground track may be completely different.
This appears to violate the rule requiring “track ...
- 27.9k
1
vote
Accepted
At what point of the design process the manufactures build their first prototype?
There is no definite answer that will fit all manufacturers and projects for the question you're asking.
Simply put, the decision to create a scale model or a first prototype depends on what the ...
- 4,175
1
vote
Accepted
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 extracted from the RNAV (GPS) RWY 23 of WESTERN NEBRASKA RGNL/WILLIAM B HEILIG FIELD (BFF) in Scottsbluff, Nebraska.
A VDP (Visual Descent Point) is only used in conjunction with an MDA (...
- 16.6k
1
vote
What is the operational advantage of starting an RNAV SID with a VI-CF leg combination?
The PBN manual is the place to start. In Section 5 on departure procedures it includes the following reference:
b. Leg type limitations. See Order 8260.46, paragraph 3-1-5 for
permissible leg ...
- 20.2k
1
vote
Based on PANS-OPS, what is the earliest turning point that can be used in a missed approach?
I can not figure out the earliest point where turning is allowed to be initiated, during a missed approach.
It is up to the designer. Nothing in PANS-OPS prohibits turns before MAPt but in that case ...
- 41
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