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Do privately owned charter planes and jets require a mandatory three digit or four digit flight number with a flight naming convention similar to Commercial airlines carriers following IATA or ICAO rules and regulations?

Do the above naming rules & regulations apply to Private Owned Helicopters?

If yes, what are the flight naming conventions?

If no, what are the reasons?

enter image description here

Source

2 Answers2

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A "call sign" is a business' name plus the (typically) three or four digit flight number.

In all ICAO member countries, private pilots use the airplane's registration number when communicating with ATC. There isn't a flight number, nor is there a company name, so the plane's registration number is all that's available to identify the flight.

Similarly, the big commercial carriers always use call signs. The "business name" is typically registered with the government, but the numbers themselves are assigned by the airline in whatever system they want to use. Usually, the only rule is that you can't have two planes with the same call sign in same airspace simultaneously (although some countries do have stricter rules than that).

For charters, small commuter airlines, etc., there is a lot of variation between countries, so I can't get more specific without knowing which country you're asking about. For instance, the FAA allows any corporation that's registered as an airline and certain charity organizations to request to be allowed to use call signs, but it's not required; they can continue to use airplane registration numbers if they so choose.

HiddenWindshield
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  • Thank you. Can you provide some examples to illustrate "Call Signs"? – Prashant Akerkar Oct 18 '21 at 06:37
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    @PrashantAkerkar it could basically be anything, as long as it's approved by aviation authorities and doesn't conflict with other operators. That's also why such things aren't that common on international flights as the approval would have to be obtained from all countries where the aircraft enters their ATC zones. – jwenting Oct 18 '21 at 07:55
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    @PrashantAkerkar If you want a quick example, British Airways is a pretty distinctive and ubiquitous one - there you hear ATC referring to BA flights by the callsign "Speedbird". – J... Oct 18 '21 at 19:50
  • @J: A call sign is not the same as a flight number, and 'speedbird' will be used only on voice exchanges, not for air traffic management systems. "British Airways flight 238 would display [...] BA238 on passengers’ boarding cards[...]. To the air traffic controllers it appears as BAW29G and when the controllers and pilots communicate via radio, you would hear ‘Speedbird Two Niner Golf ’" (more). See Call sign Confusion – mins Oct 20 '21 at 14:22
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The (very fuzzy) screenshot in your question only shows IATA 2-letter/digit airline codes. Those are only used in airline booking systems, so they are only assigned to airlines. This code is followed by a flight number (assigned by the operator) of one to four digits.

ATC uses 3-letter ICAO codes and associated callsign, and those are available to any operator that does the paperwork and pays the fees. This code is followed by a flight number (assigned by the operator) that is up to four numbers and letters. This often matches the IATA flight number, if any, but this is not required.

For a list of ICAO codes/callsigns and what companies they belong to, see FAA JO 7340.2K, Section 3. Note: the final letter of that changes over time as the document is updated.

Operators who don’t have an approved code/callsign must use the tail number of each plane.

StephenS
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