Translate the following English sentence to French:
"For the past two weeks, Greenpeace has had a ship in the middle of the South Atlantic where they have found plenty of vessels catching tuna, flying these flags of convenience."
Voilà deux semaines, Greenpeace a envoyé un vaisseau au milieu de l' Atlantique sud et l' équipage a trouvé une multitude de thoniers battant pavillon de complaisance.