The IGC Shell program is free and is for validation of
IGC flight data files. The IGC Validation Program checks that the IGC file has
originated correctly from a sealed IGC Flight Recorder, and that the flight
data in the file is identical to that originally downloaded. If only one
character in the flight data has been altered after initial download, the file
will fail the IGC Validation check.
With some types of FRs the IGC Shell program is also
used for downloading flight data from the FR. Where the downloaded file is in
binary format, the IGC Shell program converts from binary to the ASCII-based
IGC file format.
IGC Shell is compatible with MS Windows. More details
are in the Technical Specification for IGC Flight Recorders, Appendix C. The
IGC shell program was provided by former GFAC member Marc Ramsey. This program
together with a demonstration DLL can be
Note: In rare circumstances, you may get an error report
"the specified module could not be found". This should be
corrected by downloading and installing the Microsoft Visual C++
2010 Redistributable Package, either x86 or x64 version, depending on what OS
x86: https://aka.ms/vs/16/release/vc_redist.x86.exex64: https://aka.ms/vs/16/release/vc_redist.x64.exe
This section also provides links to FR manufacturers'
Dynamic Link Library (DLL) files that work with the IGC Shell program when the
DLL file is placed in the indicated directory (see Set Directories
function). Execute the IGC Shell program, select the appropriate FR
manufacturer and then the function required (such as Validate,
As well as the DLL files, the earlier generation of
DATA, VALI and CONV programs are also provided where the FR manufacturer has
not produced a DLL file. These can be downloaded by pressing the buttons below.
Buttons marked 'Verify Only' indicate that the DLL can be downloaded, but only
support the Verify function.
Note: DATA, VALI and CONV programs, due to their age, are 16-bit
programs which will run under 32-bit (X86) Operating Systems, but not under
64-bit (X64) Operating Systems. Solutions to this problem are as follows:
A link to some advice on downloading Flight Recorders
can be found on the Useful Contacts and Links