Russian Northern coast is a vast territory lays for a few thousand of miles and all this coastline is inside the Polar Circle.
Long polar winters mean no daylight at all, just one day changes another without any sign of the Sun rising above the horizon. But across this Northern coast there was always a short way for the cargo boats to travel from Eastern part of Russia to the Western.
After reviewing different ideas on how to make them work for a years without service and any external power supply, Soviet engineers decided to implement atomic energy to power up those structures.
So, special lightweight small atomic reactors were produced in limited series to be delivered to the Polar Circle lands and to be installed on the lighthouses.
Engagement in these theaters has tested Russia’s and China’s abilities to manage their differences and translate the rhetoric of partnership into tangible gains.