Questions tagged [icao-sarps]

ICAO SARPs (Standards and Recommended Practices) are technical specifications that have been recommended by ICAO for member states to adopt as civil aviation policy. This tag should be used on questions about the specifications in the ICAO SARPs rather than about the actual civil aviation regulations in a given place.

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BGBW RNP A vs Straight-in approach

Good afternoon folks. I am a bit confused and trying to find the right answer. This is what we have: Why do we have here minimum for straight-in approach even though the descent angle is 4.1 degrees? ...
Clipper's user avatar
  • 11
3 votes
0 answers
289 views

ACN/PCN Reporting System - Tire Pressure

I have an Airbus A320neo WV054 and I want to operate at a RWY that has PCN 55/R/D/Y/T. Below is my aircraft ACN data as per the Aircraft Characteristics Manual. Looking at the table I can see that my ...
alQ's user avatar
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2 votes
1 answer
492 views

Why does DME colocated with VOR require more separation?

In earlier versions of ICAO Doc 4444 (Amendment 9 and earlier), two aircraft were deemed to be laterally separated if they were departing a VOR on radials which diverged by at least 15 degrees and if ...
omprakash khamitkar's user avatar
6 votes
1 answer
724 views

What are those flight level values on an airway?

I have downloaded from this link the chart of available airways over the Canary Islands. There, in some of the airways, it says FL660 FL145 As far as I know, ...
slow_learner's user avatar
3 votes
1 answer
1k views

When must ATC give wind variation and gust?

In connection with takeoff and landing, ATC will give the current wind direction and velocity to the pilot. In some cases, ATC will also report the variation in direction and/or current gust (max and ...
60levelchange's user avatar
2 votes
1 answer
1k views

What is the minimum runway surface friction coefficient?

After calculating the friction coefficient for an asphalt runway pavement through a test, how to know if it’s acceptable or not? In other words, hat is the lowest acceptable value for friction ...
AeroEng's user avatar
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2 votes
1 answer
2k views

What are the ICAO RNAV equipment codes for the non-WAAS G1000 and GNS 430W?

When filing an ICAO IFR flight plan, where in "the manual" (which manual?) for a G1000 and a GNS430 do I find the RNAV capability information for an ICAO flight plan? What am I looking for?
Java Addict's user avatar
6 votes
2 answers
1k views

Are there any ICAO restrictions on naming a taxiway?

According to ICAO are there any certain restrictions to naming a taxiway? For example: a certain letter cannot be used it cannot have letters that match a parking stand etc.
George Costanza's user avatar
1 vote
0 answers
187 views

Is there ICAO document that describes MVA criteria?

According Skybrary article the minimum vectoring altitude in each sector provides 1000 ft above the highest obstruction in non-mountainous areas and 2000 ft above the highest obstacle in designated ...
Daniel Plainview's user avatar
2 votes
0 answers
110 views

Is the longitudinal extremity of an obstacle limitation surface based on the threshold or the displaced threshold?

In a case where a displaced threshold (DTHR) is present, should the longitudinal extremity of the obstacle limitation surfaces (for example, the conical surfaces) be counted from the threshold (THR) ...
Yassine Oubaslam's user avatar
7 votes
1 answer
191 views

Why should lower limit of a Control Area (above 3000 ft) coincide with a VFR cruising level?

In ICAO Annex 11 it is recommended: When the lower limit of a Control Area is above 900 m (3000 ft) MSL it should coincide with a VFR cruising level Why should it coincide with a VFR cruising level?
Sisir Simha's user avatar
14 votes
2 answers
5k views

Why are most helipads in São Paulo blue coated and identified by a "P"?

ICAO Annex 14, Vol II and FAA (AC 5390-2C) standards establishes 'H' and there is no mention to coating TLOF or FATO. Brazilian National Regulation (RBAC 155 - ANAC) does not provide any guideline for ...
Evandrojs's user avatar
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1 vote
1 answer
241 views

Where can we use conditional clearance?

Besides Line up conditional clearance in a PREPARATION FOR TAKE-OFF situation, where else can we use conditional clearance (on an apron, taxiway, etc.)?
Wittawat Puangsaijai's user avatar
0 votes
1 answer
70 views

Is there standard ticket data format specification for commercial flight operators? [closed]

I am new to this group and what brings me here is I am doing a research on ticketing solutions for commercial airlines. So I just wanted to find out if there's a international standard specification ...
Phemelo Khetho's user avatar
2 votes
1 answer
308 views

For a coded departure procedure (SID), Fly-At-Altitude or At-Waypoint instruction has priority in case of conflict?

I am examining various RNAV departure procedures and especially those whose purpose is to overlay the existing conventional ones. I noticed that some of them begin with a "Flight at Altitude" ...
Vector Zita's user avatar
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0 votes
2 answers
308 views

What does "1%" mean in ICAO Annex 14 § 3.9.9 (longitudinal slope changes)?

— 1 per cent per 30 m (minimum radius of curvature of 3 000 m) where the code letter is C, D, E or F; and — 1 per cent per 25 m (minimum radius of curvature of 2 500 m) where the code letter is A or ...
Saima Hasan's user avatar
26 votes
1 answer
3k views

Why is it runway "1" instead of "01" in America?

In the case of a runway with a magnetic heading of 10° in America the runway number ("1") isn't hugely distinguishable from the runway centreline IMHO, (for example see Washington Airport and San ...
Notts90's user avatar
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0 votes
1 answer
592 views

Are Transponder Mode A and C still in use?

Are the ATC transponder Mode A and Mode C still in use (according to ICAO or FAA rules)?
user41994's user avatar
1 vote
2 answers
97 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 ...
Vector Zita's user avatar
  • 1,853
2 votes
1 answer
143 views

How do flight procedure designers decide when to assign an altitude constraint to a waypoint?

I am studying procedure design manuals (TERPS, PBN 8260.58A manual, ICAO PANS-OPS 8168 manual etc.) and I haven't found any guidelines concerning altitude constraints that can be imposed on a waypoint....
Vector Zita's user avatar
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2 votes
2 answers
2k views

What is the proper ICAO phraseology to activate a flight plan?

OK, so you have a flight plan filed (over internet, phone, company or however), go to the aircraft and get in the cockpit. So you call the controller and request IFR or VFR as appropriate. What is ...
Jan Hudec's user avatar
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1 vote
0 answers
215 views

Is airport's magnetic variation value used for terminal procedure design?

I am studying how instrument flight procedures are coded to ARINC-424 format, and since I was curious about the method used to determine the outbound/inbound magnetic courses, I checked the section ...
Vector Zita's user avatar
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2 votes
2 answers
774 views

Does ICAO allow continued flight in RVSM airspace after a transponder failure?

If a civil aircraft's transponder fails in RVSM airspace, can it still be allowed to fly in RVSM according to ICAO? And could it be allowed to fly in class A airspace, according to ICAO?
Hafiz Kashif Amin's user avatar
2 votes
1 answer
61 views

What additional US-power or ICAO requirements apply to a departing US-based crew with a US-registered aircraft flying to land in Mexico?

What are additional requirements (equipment, licenses, identification, etc.) for a flight operation with a US-based aircraft and crew leaving the US to enter and land in Mexico that are imposed on the ...
Ryan Mortensen's user avatar
6 votes
1 answer
680 views

What does "zero offset between two waypoints" mean in ICAO Doc 4444?

My question is with reference to the GNSS based separation specified in ICAO Doc 4444. Could someone explain the significance/meaning of the condition "zero offset between two waypoints" criteria? if ...
user37214's user avatar
6 votes
1 answer
754 views

Can two opposite localizers to a single runway be on simultaneously?

In case of a single runway with two separate ILS systems (one in each end, facing localizers) operating on two different frequencies, can both localizers be on and transmitting at the same time, or ...
user36963's user avatar
4 votes
1 answer
254 views

In a flight plan, does it make any difference to write an increase of the flight level instead of writing a cruise climb?

According to ICAO 4444, a change of speed or level should be written in item 15 of the flight plan according to these rules: Change of speed or level (maximum 21 characters) The point at which a ...
cvasques's user avatar
  • 177
5 votes
1 answer
1k views

How do I include a STAR in an ICAO flight plan?

Would it be in accordance with ICAO norms to include a STAR identification right after the airway name in the field 15 of the flight plan? Or should the connecting point between the airway and the ...
cvasques's user avatar
  • 177
7 votes
1 answer
664 views

Is it possible to split a NOTAM in two messages in case it is too long to fit in a single message?

Would it be in accordance with ICAO norms to issue two different NOTAMs with the same year, series and number regarding the same subject and informing //PART 1 OF 2 PARTS// and //PART 2 OF 2 PARTS// ...
cvasques's user avatar
  • 177
8 votes
0 answers
721 views

How can I convert a frozen ATPL from South Africa to an Iranian one?

I have got a frozen ATPL license from South Africa and I'm from Iran. I came back home last year and I have converted my CPL/IR license to the Iranian piloting license by doing Air Law and Human ...
Amin NajibZadeh's user avatar
1 vote
3 answers
213 views

Can a controller be tasked to provide more than one ATC service at a time?

During a visit to one of the ATC Facility I found out that the Aerodrome Controller was also providing procedural approach control service along with aerodrome control service. Similarly, Area Radar ...
R.H.Mike's user avatar
4 votes
1 answer
455 views

What is the meaning of "pass well clear" in the ICAO right of way rules?

ICAO Annex 2 states under 3.2.2.1: An aircraft that is obliged by the following rules to keep out of the way of another shall avoid passing over, under or in front of the other, unless it ...
Ingenieur's user avatar
  • 291
3 votes
2 answers
1k views

When would a pilot request a "VMC descent" or "VMC climb"?

Can anybody explain what's the point of this and in what kind of situations a pilot needs it? ICAO Doc 9432 "Manual of Radiotelephony" 8.3.3 An aircraft may request a clearance to climb or ...
177's user avatar
  • 411
3 votes
3 answers
2k views

How exactly do ICAO's VOR-based minimum separation standards work?

This question is aimed at Air Traffic Controllers who are familiar with ICAO Separation minima. DOC 4444 states the following: Lateral separation between two aircraft exists when: VOR: both ...
user avatar
2 votes
1 answer
1k views

How can I calculate the Obstacle Free Zone of an aerodrome?

How can I calculate the Obstacle Free Zone of an aerodrome?
Savvas Markianidis's user avatar
2 votes
1 answer
360 views

What are the procedures for flight checking a glideslope and localizer?

What are the FAA and ICAO requirements and procedures for flight checks and calibration of glideslope and localizer transmitters? I'm interested in both the engineering and piloting aspects.
Rumi's user avatar
  • 169
0 votes
1 answer
1k views

Does in-flight Wi-Fi require regulatory approval?

Does any country have regulations that require a certificate or approval of the aircraft that use portable Wi-Fi in flight? Is there an FAA or EASA regulation or advisory, or an ICAO document or ...
Jayardi Maulana Marsa's user avatar
4 votes
1 answer
300 views

Does the ICAO definition of an "aircraft" include a minimum altitude capability?

The German air law includes in their legal definition of a "Luftfahrzeug", which is the equivalent of an aircraft, other devices intended to operate in the airspace if they are capable of being ...
Ingenieur's user avatar
  • 291
19 votes
2 answers
5k views

When replying to ATC, callsign first or last? [duplicate]

When I was in flight school, some instructor told me that it is the unknown ICAO standard that you should reply to an ATC call with your callsign first, like this: ...
Ulu83's user avatar
  • 753
1 vote
0 answers
188 views

Which American State Aircraft use the RVSM exemption?

Reading about RVSM, I noted the exemption for "state aircraft." This is summarize in wikipedia as "State aircraft", which includes aircraft used in military, customs and police service, are ...
user avatar
7 votes
1 answer
2k views

For how long is an engine start clearance valid?

If a pilot receives a clearance to start the engines, is the clearance void if he doesn't start them within a certain amount of time? How much time is allowed for starting the engines and where is it ...
K.Ruedeesarnt's user avatar
5 votes
1 answer
835 views

What differences are introduced between ICAO Annex 10 volume IV amendment 85 and amendment 89?

What changes have been made to ICAO Annex 10 volume IV (Surveillance Radar and Collision Avoidance Systems) between amendment 85 and amendment 89? I only have access to amendment 89, but I have some ...
DeltaLima's user avatar
  • 83.1k
0 votes
1 answer
871 views

What are mechanical requirements for flying over water?

What are the mechanical requirements to fly over a large water body? Are multiple engines required? Do the engine/s need to be a certain kind (turbofan, turboprop, piston)?
TayE's user avatar
  • 6,605
4 votes
3 answers
1k views

Which specific version of English are international pilots and ATC required/recommended to learn?

Are international ATC and pilots technically required to learn British English, American English, or something else? I've heard it said that they are "supposed to speak ICAO standard phraseology, ...
Matt's user avatar
  • 263
2 votes
1 answer
3k views

What is the requirement for fire fighting equipment on board a passenger flight?

What is the legal requirement regarding fire fighting equipment on a passenger flight, e.g. fire extinguishers and fire hoods? I imagine that the number is proportional to the airplane's max capacity. ...
kevin's user avatar
  • 39.7k
10 votes
1 answer
360 views

What documented practices are there for NOTAM creators and handlers to combat NOTAM spam?

Sadly, NOTAM spam is a persistent thorn in the world aviation community's side. Bureaucratic rump-covering exercises lead to NOTAMs being issued and distributed that are mere noise to the average ...
UnrecognizedFallingObject's user avatar
9 votes
2 answers
314 views

Can European (or more generally, non-US) airspace users airfile IFR flight plans?

In the US, there are two ways to airfile an IFR flight plan: Call Flight Service on the radio via the nearest FSS RCO and ask them to file the plan Ask the ATC entity you're talking to for a "pop up" ...
UnrecognizedFallingObject's user avatar
3 votes
1 answer
377 views

Which aerodromes are in the scope of ICAO recommendations?

I'm looking for a clarification of how aerodrome characteristics are regulated in a country which has signed the ICAO Chicago Convention (more on Wikipedia). To guide the answer, I'm providing a list ...
mins's user avatar
  • 71.8k
6 votes
2 answers
3k views

What separation and information does ATC provide in different airspace classes?

I am busy studying radio for my PPL in South Africa, but I'm struggling to understand the ICAO definitions of the different airspace classes, and how ATC separates traffic in them. I understand that ...
Dane's user avatar
  • 63
5 votes
1 answer
655 views

How can I know if North Atlantic Tracks have been amended?

Information about the North Atlantic Tracks is issued through Track Messages. The NAT Doc 007 document states that every track message is identified by the TMI (Track Message Identifier) number: The ...
Federico Gentile's user avatar