The Smyrtos has been anchored off Weymouth since 14 June but what happened to its crew?
The move will make it easier for the banks to conduct transactions in dollars.
The sanctions are designed to block access to assets and restrict the movement of illicit funds.
A growing number of tankers and other commercial vessels are being ditched by their owners.
US officials say that American forces plan to seize the Russian-flagged ship, which is accused of breaking sanctions.
Celebrations on the streets of Syria as US sanctions lifted
Restrictions are also being eased on the financial services and energy sectors to help investment.
The US says the Venezuelan aircraft was involved in violations of US export control and sanctions laws.
The US Treasury announces the move after the Ukrainian president called out China's involvement in Russian arms.
