As explained, the two gas carriers, “BORIS VILKITSKY” and “FEDOR LITKE”, are capable of all year round operation at temperatures up to – 50 °С, while high ice class Arc7 allows them to navigate independently in the ice of up to 2,1 m thick when moving astern.

In addition, the ships are equipped with three Azipod propulsion units of 45 MW joint capacity, which is comparable to the capacity of a nuclear icebreaker. A new membrane-type gas containment system GT NO96 GW used in cargo tanks with a total capacity of 172,600 m3, ensures safe LNG transportation through the Northern Sea Route.

A series of 15 LNG carriers is being constructed at Daewoo Shipbuilding & Marine Engineering shipyard in the Republic of Korea, as part of the implementation of the large-scale LNG production project Yamal LNG.

Russia's Yamal LNG is an integrated project encompassing natural gas production, liquefaction and shipping. The project consists of construction of a LNG plant with an output capacity of around 16.5 million tons per year, using the South Tambey Field as a resource base.

The first tanker that was specifically built for the Yamal LNG project is the 'Christophe de Margerie', an Arc7 ice-class LNG tanker, that may be used for year-round navigation without the escort of icebreakers through the Northern Sea Route (NSR) towards Western direction and for summer season navigation towards Eastern direction.