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62 votes

Why does the ICAO alphabet use "Charlie" for C?

Hard C sounds too much like K. Ch (Charlie) will not be confused with K (Kilo). And soft C sounds too much like S (Sierra).
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45 votes

What is typical ATC procedure when a non-pilot calls from a commercial flight for help?

There is absolutely nothing "typical" about such a situation, which is also why - as is the case for most abnormal situations and emergencies - there are no detailed and specific standard ...
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32 votes
Accepted

Why does the ICAO alphabet use "Charlie" for C?

ICAO is a phonetic alphabet, so it's all about sounds. English language doesn't have a distinct sound for singular letter "C". You're proposing "Carl", but it's pronounced kɑɹl̩ - with K. Other option ...
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31 votes
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When do we use IATA codes and when do we use ICAO codes?

It helps to know the objective of both ICAO and IATA to understand when which code is used. ICAO (International Civil Aviation Organization) is a UN-body which focusses on international harmonization ...
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24 votes

Why does the ICAO alphabet use "Charlie" for C?

For the same reason we use niner for nine. The phonetic alphabet took a lot into consideration when they were choosing words including how words are pronounced with different accents. "Charlie" like ...
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22 votes

What is the difference between ICAO, JAA, FAA, EASA, and CAA?

ICAO is the International Civil Aviation Organization, a specialized agency of United Nations. It was created after the Convention on International Civil Aviation (the Chicago Convention) of 1944 was ...
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21 votes

What is the exact meaning of "manoeuvring" when said by ATC in reference to traffic?

I haven't been able to find a precise definition in either the CAA or the FAA's materials. However, as I understand it, traffic that's "maneuvering" is traffic that's not going anywhere in ...
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17 votes

What organisation owns intersection names?

The allocation of waypoint names is actually handled by each country's individual aviation authority. This means that there are actually duplicates in different countries or regions. The ICAO has made ...
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14 votes
Accepted

Where to find a waypoints/fixed points, navaids and airports database?

Nice question. There are several ways how to get these information. http://www.fallingrain.com/: free to use, no registration needed. World database of the airports and waypoints. From these ...
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  • 316
13 votes
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What is different between a Cat IIIA, Cat IIIB, and Cat IIIC ILS approach?

ICAO and FAA CAT III definitions A CAT III operation is a precision approach at lower than CAT II minima. Sub-categories are listed below. A category III A approach is a precision instrument ...
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  • 1,048
12 votes
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Which "pilotless aircraft" did the authors of the 1944 Chicago convention have in mind?

Note that the article says that No aircraft capable of being flown without a pilot At that point of time there were a number of radio controlled aircraft which could be flown without a pilot on ...
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12 votes

What organisation owns intersection names?

As already said in HiddenWindshield's answer, the five letter intersection codes do not have to be unique worldwide. I thought it might be interesting to see how many times these codes are actually ...
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  • 45k
11 votes
Accepted

How do non-US pilots get the hours necessary for an ATP?

Under the rules of ICAO Annex 1, Personnel Licensing, you don't need an ATP License to fly as second in command (SIC) on a commercial aircraft required to be operated with a co-pilot. A commercial ...
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  • 74.8k
11 votes

What are the advantages, disadvantages and current state of affairs for text-based ATC?

I'm a newbie pilot, but I wanted to give the obvious example that crossed my mind when I read your question. In the UK GA world we have to, for example, call up to say we're on final approach. Finals ...
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11 votes
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Is there a definition of light/medium/heavy aircraft?

Section 4.9.1.1 of ICAO PANS-ATM-Doc 4444 Air Traffic Management defines LIGHT, MEDIUM & HEAVY aircraft for the purpose of wake separation: 4.9.1 Wake turbulence categories of aircraft 4.9.1.1 ...
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11 votes
Accepted

Can one country really ban another from using its airspace?

Yes they can. There was an attempt to allow one to pass over a country freely with the Freedoms of the Air however this is not a blanket thing and not everyone partakes. ....As of the summer of ...
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10 votes
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What will the 737 MAX 7, 8, and 9 ICAO IDs be?

The new Boeing 737 MAX is based on the Boeing 737 Next Generation family, which it will replace. Also note that 737 MAX is still under development and is scheduled to release in 2017. Update: (...
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  • 29.1k
10 votes
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How to get registration from ICAO 24 bit code?

Apparently (according to these folks) some countries use an algorithm to generate their ICAO (Mode S) 24-bit IDs. For those countries, you can simply reverse the algorithm and get a registration given ...
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  • 67.2k
10 votes

Why isn't an LPV SBAS approach considered a precision approach according to ICAO?

Precision Approaches (PA), as you mention, have specific performance requirements, one of which is how "good" the vertical position measurement must be during an approach. In the case of a PA, ground ...
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  • 1,735
10 votes

Is it possible to fly an EASA registered airplane with an ICAO license?

The ICAO doesn't issue licenses, so there's no such thing as an ICAO license. You have a license issues by the Argentine aviation authorities is ICAO compliant, which means it is recognized ...
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  • 49.6k
9 votes

Are conditional line-up clearances still valid if the referenced traffic initiates a go-around / missed approach?

This may sound obvious, but you should probably ask ATC. In the sentence given it specifies that you should line up behind the Landing B757, not the Going Around B757. This sounds pedantic, but the ...
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  • 10.3k
9 votes
Accepted

What ICAO codes are reserved for TIS-B use?

In this answer I'll assume you are analysing ADS-B data on 1090 MHz, which is the defacto global standard. I am less familiar with the ADS-B on UAT (987 MHz) which is used in addition to 1090MHz in ...
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  • 74.8k
9 votes

What are the ICAO PANS? What are their contents?

ICAO Procedures for Air Navigation Services (PANS) are documents approved by the ICAO counsel and recommended to states for worldwide application. As such they attempt to make air navigation services ...
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  • 74.8k
9 votes

What are the advantages, disadvantages and current state of affairs for text-based ATC?

The main advantages of text based ATC over voice based communication are Earlier messages can be recalled Messages can be printed Messages can be read by automated systems, allow clearances to be ...
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  • 74.8k
9 votes
Accepted

What does ICAO database "engine count c" mean?

I don't know the exact ICAO phraseology, but it certainly seems to describe an aircraft that has two engines combined to a single driveshaft. Soloy has trademarked the 'Dual Pac', a pair of ...
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