Hi,

I am very much in favor of the idea to make it possible to use lower cost
units.

However, I fear that passing the responsibility for approving units down to
each country is making this all very complicated - which is unfortunate.

Paul Remde

"Ian Strachan" wrote in message
...
On Feb 17, 8:37 pm, cfinn wrote:

One thing that hsn't really been mentioned is the requirement that you
also have a barograph on board for badges and records if you use a
position recorder instead of a flight recorder.

That is only so if the Position Recorder does not have its own
pressure altitude sensor.

However, there is also a range of recorders (below the level of IGC-
approved Flight Recorders), that DO have a pressure altitude sensor
that can be calibrated to the ICAO ISA, and where altitude to the ICAO
ISA appears in the IGC file that is downloaded.

For instance, the French Position Recorder approval document lists
seven such devices, see:

http://www.fai.org/gliding/system/fi...appr_Flarm.pdf (French version
first, then English)

and the Australian document for OzFlarm lists two:
http://www.fai.org/gliding/system/fi...larm_minOz.pdf

There is also an Australian document on pressure altitude calibrations
of pre-IGC-approved Flarm devices, using a method that was discovered
by GFAC and does not require an update to these pre-IGC-approved Flarm
devices:
http://www.fai.org/gliding/system/fi...guidelines.pdf

Other National Gliding Authorities can look at the above documents and
decide whether they wish to produce their own versions for flights
under their jurisdiction.

Hope this clarification helps, although all the rules and procedures
for IGC Position Recorders are at: www.fai.org/gliding/position_recorders

Ian Strachan