The Aviation Register of Interstate Aviation Committee (IAC AR) issued a Supplemental Type Certificate for the Sukhoi Superjet 100 (SSJ100), permitting the usage of Vertical Navigation (VNAV) functionality at all stages of flight. The Sukhoi Superjet 100 represents the first Russian built aircraft to achieve VNAV certification at all stages of flight. IAC AR confirmed that VNAV functionality can be used on Sukhoi Superjet 100 aircraft in its Basic version. The VNAV will be possible at all stages of the SSJ100 flight, as well as in the airports with non-precision approach. The VNAV or vertical navigation is an aircraft function that calculates a vertical profile of the flight in accordance with the assigned path, considering aircraft performance, as well as all speed and height restrictions applied to a specific path. VNAV functionality provides vertical profile keeping recommendations to pilots during climb and cruising. It also ensures a fully automatic control during descend and approach.