More than 300 merchant vessels are waiting to enter and exit the Black Sea amid Russia’s continued attack on Ukraine.

There are 110 ships that have gathered outside the Bosphorus Strait in the Sea of Marmara, up from 50 vessels five days ago, according to VesselsValue data.

“Vessels waiting at the southern entrance of the Bosphorus Strait destined for the Black Sea may fear consequences of transiting when the environment the other side remains hostile,” trade flow analyst Peter Williams told tradeWinds.