Which ministry is in charge of the service that owns the oceanographic research vessel "Dr. Bernardo A. Houssay"?
RV Atlantis:  The former "Atlantis" is now commissioned as an oceanographic research vessel in the Argentine Naval Prefecture as the "Dr. Bernardo A. Houssay". Argentine Naval Prefecture: The Argentine Naval Prefecture (Spanish: Prefectura Naval Argentina or PNA) is a service of the Argentine Security Ministry charged with protecting the country's rivers and maritime territory.
the Argentine Security Ministry