The Wall Street Journal Risk & Compliance Report on 22 August reported that those designated had allegedly aided an evasion effort by Russian firm, Divetechnoservices, which had helped improve Russia’s cyber and underwater capabilities by procuring undersea equipment and diving systems for Russian government agencies. Undersea cables carry nearly all global internet traffic and financial transactions. A significant disruption of the service carried by the cables could have a catastrophic effect on global business and markets.
https://www.treasury.gov/resource-center/sanctions/OFAC-Enforcement/Pages/20180821.aspx
https://home.treasury.gov/news/press-releases/sm462
OFAC ALSO DESIGNATES 6 RUSSIAN-FLAGGED VESSELS
Bella, Bogatyr, Neptun, Partizan, Patriot and Sevastopol were designated on 21 August.
https://www.treasury.gov/resource-center/sanctions/OFAC-Enforcement/Pages/20180821.aspx