Robert M. Gary wrote:

Sam Spade wrote:

I've never used TIS, but I heard before what you state. Problem is the
limited coverage and I understand the feds can turn it off if the need
arises. They can't fiddle with TCAS.


They can also turn of GPS. The Europeans are very concerned about this.

-Robert


But, they have turned off TIS whereas they haven' turned off GPS. The
former is low-level tactical stuff at the air traffic facility level;
the latter is at the presidential and joint chiefs staff level.

The Europeans have been known to cry about falling sky on more than one
occasion. Their "concerns" about GPS defy logic for those involved in
aviation planning and system risk assessment.