As the media speculate about some "special navigation equipment" installed in Smolensk before the landing of Putin's plane on April 7 (and immediately removed thereafter) there is also a remark concerning the approach type flown on April 7 and probably 3 days later as well (Google translation):
"RMF FM [Polish radio station]adds that according to the Polish pilots and aviation experts, even if some additional equipment during Putin's arrival was there, our pilots did not know about it. Bartosz Stroiński Colonel - Commander Tupolev, which on April 7 to Prime Minister Tusk flew Smolensk - in a conversation with a reporter RMF FM Krzysztof rule said that the crew approached the landing, using standard equipment of the local military airport. Stroiński acknowledges that it is quite poor - RMF FM reported.
The most difficult at the airport in bad conditions may be the lack of precision approach. Instrumentation must be suitable airport to be able to perform precision approach - explains. He adds, the airport is equipped with two radio beacons - closer and further leads. According to them, shall be the approach for landing."