MV NS Concord is a Russian owned, Liberian-flagged oil tanker that gained notoriety in 2014 after it was allegedly connected to the submarine search in the Stockholm archipelago.

[1] The oil tanker arrived in the area on October 4 but was later charted as zigzagging across the seas, as if searching for something.

[2] The vessel "could be a mothership for a possible submarine," according to Stefan Ring, an expert on military strategies at The Swedish National Defence College.

[4] NS Concord belongs to the Russian shipping company SCF Novoship, based in Novorossiysk on the Black Sea.

The company is in turn part of the state-owned OAO Sovcomflot, one of the world's largest oil transport companies, whose CEO, Sergei Frank, is a close confidant of Russian President Vladimir Putin.