[8] While the state budget did not initially allocate funding for the new icebreakers, the construction was nonetheless set to begin already in 2004 and the lead ship was to be delivered by November 2006.

[11][13] While the azimuthing propulsion units improve the maneuverability of the icebreaker,[7] she is also fitted with a single transverse bow thruster.

[3] The two Project 21900 icebreakers were originally built to ensure year-round transportation of crude oil from the terminal in Primorsk.

[4] Moskva's primary mission was to escort oil tankers up to 50 metres (164 ft) in breadth in the Gulf of Finland.

[7] Since 2016, Moskva has occasionally been stationed in the Arctic LNG terminal of Sabetta in the Gulf of Ob during the winter months.