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new IGC-approval published

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Old October 28th 20, 04:46 PM posted to rec.aviation.soaring
Ian Strachan[_4_]
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Default new IGC-approval published

Flarm IGC-approvals

IGC-approval documents for Flarm-IGC and PowerFlarm-IGC have been updated.
In the case of PowerFlarm, a variant called "Fusion" has been added.
For the original Flarm-IGC model, the IGC-FLA.DLL file for validating IGC files has been updated.

These documents may be accessed via the FAI/IGC web site and also via the GFAC web site. These web sites include the main table of IGC-approvals, copies of all current IGC-approval documents, a table of Flight Recorder manufacturers, a date list of all IGC-approval activities since the first ones in 1996, and a History of the GNSS recording in IGC.

Ian W Strachan
Chairman, IGC GNSS Flight Recorder Approval Committee (GFAC)


1. For the IGC web site, see:
Scroll down and click "Flight Recorders",
look down and click on: "IGC-approved Flight Recorders - Approval Documents"
then click on "IGC-approval Documents for all IGC-approved Flight Recorders"
This will call up a list of documents, the first document being the "master" table of all IGC-approved FRs with links to Approval documents, after the master FR table there is a Manufacturer table, a List of updates over time, and a description of the History of FRs in IGC.

2. For the GFAC web site, see: www.ukiws.uk/GFAC
the complete table can be viewed directly at:
This table lists the name and main characteristics of individual IGC-approvals and in the last column there is a link to individual documents, click the link to call up the document. The table is followed by a list of individual IGC-approval documents in alphabetical order of manufacturer’s name from Aircotec to Zander. These can be called up by clicking the document name.


If you own an IGC-approved FR, or fly with one, it is recommended that you download its latest IGC-approval document from one of the web sites given below, and note any changes that may affect how you operate it.

IGC-approval - General
IGC-approval follows test and evaluation by the IGC GNSS Flight Recorder Approval Committee (GFAC) in accordance with Annex B to the Sporting Code for gliding and the Technical Specification for IGC-approved GNSS Flight Recorders.

The Technical Specification is available through the igc-documents web site above
or directly from the GFAC web site:

Programs that have been notified to IGC for the analysis of IGC files are listed on the GFAC web site under: "Analysis Programs for IGC Flight Data Files"

The Validation process checks that an IGC file has the correct structure and that the file is the same as initially downloaded from the FR. This is achieved either through the IGC Shell program, or through analysis programs such as SeeYou that include IGC Shell within their overall program.
IGC Shell may be downloaded he www.ukiws.uk/GFAC/downloads.htm
This downloads the file IGCDLL.zip, which when un-zipped, gives the IGC Shell program. This web site also contains the latest FR Manufacturers’ Data Link Library (DLL) files that are used by IGC Shell and other programs to Validate the structure of an IGC file. The IGC file Validate check ensures that the IGC file came from a serviceable and secure FR, and the file is identical to when it was originally downloaded. This check is required before a flight performance recorded in the IGC file can be approved to the standards of IGC.

Finally, the Sporting Code for gliding (SC3) and its annexes A-D may be downloaded via: www.fai.org/igc-documents in which "Sporting Code - Section 3: Gliding" is at the top of the list.

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