Portugal's navy and air force took part in the seizure, with a street value of more than 70 million euros ($77 million), amid "very difficult weather conditions," a Portuguese police statement said Monday.
The Portuguese operation was supported by police in Brazil, the U.S., Britain, France and Spain.
Intelligence-gathering that helped locate and intercept the yacht was coordinated by the Maritime Analysis and Operations Centre -- Narcotics, based in Lisbon.
Two foreign men aged 51 and 53 were arrested in the operation, Portuguese police said.
It's a pretty bad day when you are hauling coke in the middle of the Atlantic and get set upon by 6 different authorities