'This is the first such incident against commercial shipping'. In the Ukrainian Port city of Mariupol, Russian-backed separatists have seized two foreign flagged ships.That’s according to Dryad Global’s latest Maritime Security Threat Advisory (MSTA), which highlighted that these were the Panama flagged Blue Star I and the Liberia-flagged Smarta vessel. The Blue Star I is a general cargo ship built in 2005, while the Smarta is a bulk carrier built in 2007.