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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).
CrossRoads's user avatar
  • 8,785
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 ...
60levelchange's user avatar
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 ...
Agent_L's user avatar
  • 1,392
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 ...
Dave's user avatar
  • 101k
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 ...
HiddenWindshield's user avatar
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 ...
HiddenWindshield's user avatar
13 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 ...
Bianfable's user avatar
  • 55.5k
13 votes
Accepted

Are airport codes with digits valid or pseudo ICAO codes?

No, those are not ICAO codes. ICAO airport identifiers consist of four letters, full stop. But that does not mean that any code which is other-than-four-letters is "invalid" or "...
randomhead's user avatar
  • 14.8k
12 votes
Accepted

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 ...
aeroalias's user avatar
  • 100k
11 votes
Accepted

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 ...
Notts90's user avatar
  • 3,559
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 ...
Dave's user avatar
  • 101k
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 ...
nodapic's user avatar
  • 1,817
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 ...
GdD's user avatar
  • 53.7k
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 ...
egid's user avatar
  • 23.3k
9 votes

What methodology did ICAO use to create the overall code nomenclature for airports?

There is no one, easy answer for where each region (or country) got their one- or two-letter designation. Many of them evolved over time. When the ICAO (as an organizational body) was formed out of ...
Jimmy's user avatar
  • 2,829
8 votes

Where can I find old (historical) FIR map?

This is a photo from the 1954-1955 Hong Kong Civil Aviation Department Annual Report Maybe too late to post, but I just want to share it on the internet as a record.
Edwin Yeung's user avatar
8 votes
Accepted

Where can I find old (historical) FIR map?

The best I can find is a ATC radar screen used in a dated report (appears to be a report by the Hong Kong Civil Aviation Department in 2000). It shows the FIR regions and waypoints of near Hong Kong, ...
kevin's user avatar
  • 39.7k
8 votes

Why can't we choose our own call sign?

Let's clear a few things up. Scheduled flights generally use the airline prefix followed by the flight number as their callsign. So the callsign of United Airlines flight number 345 will be "...
DJClayworth's user avatar
  • 3,728
7 votes

May an emergency aircraft land on a closed runway?

Faced with bad weather, some icing, and an aircraft with a collapsed gear on the runway, I landed on the taxiway. The matter was complicated in that ATC was unaware of the runway closure. This was ...
mongo's user avatar
  • 17.7k
7 votes

Which agency issues private pilot certificates?

Here in the USA the FAA is the agency that issues all levels of Pilots Certificates. However the certificate is not simply applied for, it requires training and the passage of a written, oral, and ...
Dave's user avatar
  • 101k
7 votes

Why can't we choose our own call sign?

As DJClayworth touched on, your proposal would create too many words to make them standard. Standard phraseology is much easier to learn and also much easier to understand over the radio since you ...
fooot's user avatar
  • 72.8k
6 votes
Accepted

Where is the formal ICAO flight plan text format specified?

You will want to look in PANS-ATM (ICAO Document 4444), specifically, Appendix 2. (reproducing the entire appendix in this answer is not practical; it is 10 pages long). SKYbrary is also a nice ...
60levelchange's user avatar
6 votes

Do the ICAO and IATA codes for an airport ever change?

Yes it does happen. A city can build a new airport, in which case it will usually get a new ICAO code, but will get the original IATA (city) code. For example, Oslo changed from Fornebu to Gardemoen -...
RAC's user avatar
  • 4,616
6 votes

Where can I find a free list of ICAO and IATA airport identifiers?

It depends on whether it should be reliable enough to be used operationally. If yes, I don’t know one and would to the best of my knowledge advise spending some sort of money. If no, maybe openflights....
Cpt Reynolds's user avatar
  • 4,797

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