The captain of a tanker owned by Greece's Minerva Marine was rescued by the Portuguese Air Force (FAP) on Saturday.
The 47-year-old a Greek national was described as being in "a very serious clinical condition", according to a statement from FAP on Sunday.
The man was at work onboard the aframax Minerva Gloria (built 2009), which was underway in the Atlantic at the time of the evacuation.
