According to the treaty, an observation aircraft can only be equipped with sensors from the categories, specified by the treaty, excluding any type of armament.
During the flight along a route, approved by the participating parties, Russian specialists on board the plane will monitor the use of the surveillance equipment and ensure compliance with the treaty provisions.
The Treaty on Open Skies was signed in 1992 in Helsinki and currently applies to 34 countries.
The treaty establishes a regime of unarmed aerial observation flights over the entire territory of its participants.
The treaty is designed to enhance mutual understanding and confidence by giving all participants a direct role in gathering information about areas of concern to them.