Ramy wrote:
An eye opener:
http://www.aviationnow.com/avnow/new...s/bca0107c.xml

It was reports such as this that contributed to the dream (of 15 or so
years ago) that a portable battery powered ADS-B unit suitable for
skydivers, gliders, ultralights etc, could be produced for under $1000.
Once the dream passed through the normal bureaucratic process ADS-B
was delayed over 20 years, will not be portable, and will cost more
than most pilots will be willing to pay.

Andy