[caww]

Here’s the comment on the compatibility issue.....

April, 2010, 22:23
Speaking to RT, defence analyst and former Polish military pilot Mikhal Fisher noted a previously unmentioned factor that possibly was one of the reasons for the crash.

“In the Soviet Union/Russia they use a unique instrumental landing system called PRMG. It works almost exactly the same way as the international Western system ILS. However, the two are not compatible. The Polish airplane was modified to use the ILS, as the [Soviet] airplane was mainly flying to various airports that use it,” Fisher told RT.

http://rt.com/Top_News/2010-04-10/landing-systems-kaczynski-crash.html

[dfwgator]

First item on the agenda for Poland is to replace all Russian planes with US planes.

I still remember the 1980 crash in Poland that killed a good portion of the US Amateur Boxing team, that was an Ilyushin Il-62.