Yersin: Our Research Vessel

The Yersin, an ocean-friendly exploration platform

The Yersin is a versatile and modular transoceanic ship designed for travel and exploration.

It offers the scientific community conditions of maximum comfort and safety. It carries the advanced technologies needed for research and communication.

To limit its impact on the environment the shipowner François Fiat built an ecological “clean ship”.
It abides by the Charter of the Belle Classe Superyacht of the Yacht Club of Monaco of which Fiat is the first Ambassador.

This Charter places the protection of the sea and the environment at the heart of the development of yachting.
The Yersin was built with technologies that allow it to perform exceptionally well:

  • Treated hull with silicone non-stick coating avoiding harmful chemical releases
  • Resin-coated exterior bridges to replace teak
  • Particulate lters on exhausts
  • Crushing, sterilization and waste storage for a period of 50 days for 40 people
  • Membrane biological treatment plant for gray and black waters (Zero discharge for 10 days)
  • Optimization of energy consumption, etc.

This 250 foot, 2250-ton ship accommodates 18 passengers plus crew.

main Features

  • Length: 251 feet
  • Beam: 42.5 feet
  • Draft: 14.75 feet
  • Fuel capacity: 350,000 liters
  • Water capacity: 50,000 liters
  • Accommodation capacity: 44 p. (Including crew)
  • Max speed: 16 knots Cruising speed: 12 knots
  • Vessel Range: 12,000 miles at 11 knots
  • Hull / superstructure: Steel / aluminum


  • Diesel Electric Propulsion: 2x Azipods SCHOTTEL,
    1 pump-jet SCHOTTEL
  • Generators : 4 x 1000 kVA + 2 x 500 kVA
  • 1 pump-jet: 600 kW


  • Aft Crane: Max Load 1.5T/8m, 3T/5m
  • Fore crane: 1T/6m
  • Local diving compressor Location for 4 boats Multifunction platform: 140 m2


The ship bears the name of this humanitarian doctor who was passionate about Vietnam.

Dr. Alexandre Yersin (1863-1943) worked with Pasteur, Roux and Calmette. A doctor at Maritime Messengers, he founded the Institut Pasteur of Nha Trang and the Hanoi School of Medicine (1902).
His research on diphtheria toxin and the discovery of the plague bacillus (1894) contributed to his fame. He was a pioneer in the cultivation of the rubber tree, acclimatized the quinine in Indochina and devoted himself from 1902 until his death to assisting the local populations of Vietnam.

We owe him this motto:


The Owner

François Fiat, 68, was born in Marseille, France.

Former journalist (Europe 1) and then private secretary of a commercial developer, he joined the company of his father-in-law, founder of Franprix stores, and then founded and launched the brand Leader Price (1990).

These companies were sold in 2009 and François Fiat now manages the family holding company.

He is an accomplished sportsman who practiced squash and auto racing from 1976 to 2007.

François Fiat has been a member of the Yacht Club of Monaco since 2008 and the rst ambassador of the Belle Classe Super Yachts since 2009 for an eco-responsible development of ships and practices at sea. Inspired by Tintin’s readings and maritime adventures (Albert Ier, Alain Gerbault, Moitessier, Cousteau), he developed the ASE project (Adventure, Science, Education) and has chosen to develop a versatile expedition vessel for all seas and weather types.

The Yersin was built in Concarneau, Brittany by the shipyard Piriou, which specializes in ships designed to work far from their base. The Yersin was launched on June 20, 2015 in Monaco in the presence of H.S.H. Prince Albert II.

After two test campaigns in 2015 and 2016, in hot and cold/ice zones, the Yersin is now fully operational with a crew of 22 people and equipment ready for extended expeditions.