wrote in news:1103251889.160802.229680
@f14g2000cwb.googlegroups.com:

snip
I've had more near misses at HGR than any other airport. Is this a
controller problem or is this a lack of equipment problem. One example
was a controller turned an airplane into me rather than telling them to
follow me as #2 for landing. Another example was an IFR biz jet that
was doing a VOR 9 approach while I was cleared for landing (RWY 9) and
about to turn final (I had to firewall the throttle and climb hard to
keep from becoming a hood ornament). In the latter case, HGR tower
didn't know the biz jet was doing the approach (seems someone forgot to
tell them).

If the biz Jet was not talking to tower, he couldn't have been cleared to
land on the runway... If he wasn't talking to approach either, he was not
maintaining two-way radio communication with ATC while in the Class D
Airspace, which is illegal.

So the example, I suspect, is one of someone who didn't follow the rules for
some reason. In that scenario, the competence of the controller or the
equipment is barely relevant. The same situation could have happened (and is
more likely) at a non-towered airport - someone shooting IFR practice
approachs pops up on final and never announces his position on the radio. If
you happen to see him, great. If you don't, at least at a towered airport you
have a guy with a pair of binoculars helping to watch your back.