In June-July 1998 three Italian researchers (Giuseppe Longo, Mario Di Martino, Romano Serra) participated to the Krasnoyarsk Tunguska Conference and made an in situ recognition on the lake Cheko.

At the Krasnoyarsk Conference, the tasks and organization of the Tunguska99 expedition were illustrated asking for suggestions of Russian colleagues. Details of the local support from Russian personnel and researchers were agreed with N.V. Vasilyev and G.V. Andreev.

Andrey and Viktor Chernikov assisted the Italian team in the recognition on the lake Cheko. The necessary measurements were made to plan were the habitable tents, field laboratories and services could be placed. Subsequently, Igor Doroshin directed the  building of the camp at some hundreds kilometres from centres connected by roads.