Three Viforul Class MTBs were built by Vospers in the United Kingdom and delivered to Romania in 1940. Romania received a licence to build these but were unable to get the tools requires before Romania joined the Axis. The classes biggest claim was the sinking of Shch-206 a soviet sub that had penetrated the defences of Mangalia Port on the 9 July 1941. Later 2 of the class were sunk when they hit debris from a sunken merchant vessel as they tried to rescue survivors. The finial boat then was used as training for the new Gusto And Italian MTBs they acquired.