Sovcomflot has continued with a reorganisation of its fleet after 14 tankers were sanctioned by the US in February.
The Russian state shipowner has transferred 12 of these vessels to the Russian Register of Ships (RSClass), switching from the Indian Register of Ships (IRClass), according to their websites.
Equasis also lists the tankers’ class as withdrawn from the Indian class society and transferred to RSClass.
Sovcomflot has already had to find new insurers due to sanctions.
And last month it moved four sanctioned tankers from the Gabon flag to Russia, as well as renaming them.
IRClass is part of the International Association of Classification Societies, but RSClass is not, which could make entry into some ports more difficult.
The Indian company had emerged as a bigger provider of class services to Russian ships over the past two years, Reuters reported.
IRClass still covers two of the 14 sanctioned tankers: the 105,700-dwt NS Consul (built 2006) and 105,800-dwt NS Creation (built 2007).
The two class societies have not commented.
Most of the 14 tankers are anchored off or are sailing to Russian ports, including Nakhodka and Vladivostok in Asia and Ust-Luga and Novorossiysk in the Black Sea, LSEG shipping data showed.
The suezmax and three aframaxes that were reflagged are the 156,000-dwt NS Bravo (built 2010) and 105,900-dwt NS Captain (built 2006), 105,700-dwt NS Columbus and 105,800-dwt NS Creation (both built 2007).
