"Walter Smith" wrote in message
news:Rwy9g.1012$cl5.915@trndny07...
On 2006-05-14, Tony Goetz wrote:

http://www.naco.faa.gov/index.asp?xm...hart_bulletins

Also from the FAA, on average you can expect 100 changes to each
TAC, 278 changes to each sectional, and 775 changes to each AFD
(source: http://www.naco.faa.gov/index.asp?xml=naco/faq ). Oh
well.

That average stated in the faq does not seem to be consistent with the
chart bulletins. I looked at the chart bulletin for the New York VFR
sectional, and the last change was last November. Zero is much less
than 278. So does that mean there were no changes from the previous
revision and the current one, or are the chart bulletins incomplete?

The latter, I think. For example, over the past several years, I've noticed
and reported more than a dozen instances in which airports in the NY
Sectional were displaced by up to a mile or so from their actual locations
(in some cases, they were moved to the wrong side of a river or highway,
which makes it particularly confusing to use the chart to find a given
airport for the first time). The errors were always fixed in the next
edition, but I've never seen such repositionings mentioned in the chart
bulletins.

--Gary