Russia's Rubin Design Bureau presents the second version of its Border and Offshore Submersible Sentry (BOSS) patrol ship that combines the benefits of a submarine and a surface patrol ship.

Rubin offers the first version of a submersible patrol ship combining the benefits of a submarine and a surface patrol vessel. The concept named the Sentry (Border and Offshore Submersible Sentry, BOSS) is intended for foreign customers.