TIS and What could have been

Chuck wrote:



So now we have a low wing (my Archer) above a high wing (172) and I
have been cleared to decend.

You were never restricted from descending in the first place.



I think TIS may have saved my ( and others) life today and the FAA is
decomissioning the sites with the explination that ADS-B is going to be
better when they get it implemented in the next few years and an an
inexpensive plane electronic becomes available.

That's correct. TIS was obsolete before it was even commissioned.

Newps wrote:

That's correct. TIS was obsolete before it was even commissioned.

Not to mention impractical.

Why so?
I find it very useful and practical when it is available.

Boy, the installer for the mode S a year and a half ago didn't mention
that it was either impractical or obsolete!

Chuck wrote:

Why so?
I find it very useful and practical when it is available.

Boy, the installer for the mode S a year and a half ago didn't mention
that it was either impractical or obsolete!

It is impractical from a total systems perspective. It's not unlike TLS
and ILS.

I am sure it is a nice-to-have when you're in the limited service areas.
TCAS, on the other hand, works everywhere independently of the FAA's ATC
system.

It's a niche solution and competes for resources.