On Apr 5, 10:10 am, Blanche wrote:
Blanche writes:

[useless excretions snipped]

Actually, there is. 1/4 of the first floor of the main offices is
dedicated to an extremely human-labor-intensive activity that must
validate and verify *each and every* item of information when it
comes in from the various CAAs. I didn't notice any "white-haired scribes",
oh wait -- yes, there were a couple of gentlemen that might be offended
at the term.

Then the data is verified and validated a *second* time.
Add to this the time constraints - there are four cycles of
7/14/28/56 days depending on need. Then and only then can the data
be converted to the JAD - Jeppesen Aviation Database, from which
all Jepp data is munged.

Every time an airport changes a frequency, identifier, phone number,
runways, departure procedures, approach procedures, terminal information,
fixes (intrument, visual, GPS), low-enroute, high-enroute, *anything*.
And it happens more frequently than most people realize imagine.

And, Jepp handles the world. When I use the term CAA, that's the generic
for any country's aviation authority. In the US, it's the FAA. There's
also the JAA, and others.

The advantage of living in the Denver area - Jepp is located just
west of the 17-35 runway of KAPA. When you decide to visit, I'll
happily arrange a tour.

I was there the week of the 19th for the RAA Flt. Tech. Cmte
conference. Impressive facility.

The president came in for a quick brief to us, and someone in the
audience asked him why the electronic versions are not cheaper than
hardcopy. What you indicate above concurs exactly what he said wrt
format conversions, V&V, etc. being the bulk of the process.

Regards,
Jon