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Author Topic: Basic Hex code questions  (Read 2969 times)

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andrewarles

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Basic Hex code questions
« on: August 15, 2010, 02:28:27 PM »
Hi,

Sorry, but I have some very basic questions that I would like to clarify:

-   The HEX codes on the US register are allocated to a registration and not to a particular aircraft.  Therefore, when an aircraft changes registration, whether it stays in that country or not, its HEX code will change, is that correct?
-   If so, is the HEX code deleted from the db, or does it stay in the db with an empty type field awaiting a new allocated aircraft?
-   Do these rules apply to every country?

Thanks

Andrew
16 NM SSW of LFMV (Avignon)
27 NM NW of LFML (Marseille)
Arles, France.

DaveReid

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Re: Basic Hex code questions
« Reply #1 on: August 15, 2010, 03:37:19 PM »
Sorry, but I have some very basic questions that I would like to clarify:

Don't apologise, everyone has something to learn

Quote
The HEX codes on the US register are allocated to a registration and not to a particular aircraft.  Therefore, when an aircraft changes registration, whether it stays in that country or not, its HEX code will change, is that correct?

Correct.

Quote
If so, is the HEX code deleted from the db, or does it stay in the db with an empty type field awaiting a new allocated aircraft?

AFAIK, aircraft removed from the US register are not automatically deleted from the database - in fact the DB shipped with RadarBox contains lots of examples of aircraft deregistered many years ago.

If an N-number is subsequently re-used, then I would expect the updaters to pick that up sooner or later, but with only about a third of available N-numbers in use at any one time there is no guarantee that a tail number will ever be re-used.

Quote
Do these rules apply to every country?

No.  Although many countries do it that way, it's contrary to ICAO recommendations, which say that a hex code should only change when an aircraft is re-registered in another country.

The UK, of course, does it correctly - if an aircraft changes from one G- mark to another G- mark, it keeps its hex code.
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andrewarles

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Re: Basic Hex code questions
« Reply #2 on: August 15, 2010, 04:43:58 PM »
Dave,

Thanks for your reply.

I was updating the RadarBox database, and wondering whether I should delete all the out of date records, and there are a lot of them.

Rgds

Andrew
16 NM SSW of LFMV (Avignon)
27 NM NW of LFML (Marseille)
Arles, France.

Runway 31

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Re: Basic Hex code questions
« Reply #3 on: August 15, 2010, 05:36:43 PM »
It also doesnt help that there are hundreds of aircraft flying about using their old hex code especially in America