In 1933, Maurice Léchelon, a civil engineer in the Marine Engineering Department, became a senior engineer at the La Ciotat shipyards.

In 1951, he went “to the other side of the barricade” and became a supplier to the shipyards.

As a customer, he represented, with the title of Technical Director, the Onassis armament company, which was soon to build very large tankers.

As a supplier of auxiliary equipment, from 1955 onwards, he became a consulting engineer for large companies such as Tunzini, Asea and Westinghouse, and also the exclusive representative for France:

Matériel Auxiliaire Marine, abbreviation M.A.M.

– Coffin Turbo Pumps, USA, (boiler feed turbopumps)

– Peerless pump, USA, (fire fighting pumps)

– Galbraith-Pilot Marine, United States, (salinometers)

– Griscom Russel, USA, (evaporators)

– Leslie Controls, USA, (industrial valves)

– Ruhrpumpen, Germany, (pumps)

– Oestermann, Germany, (propellers)

– Friedrich Kocks, Germany, (windlasses)

– Machinefabriek Nijhuis, Netherlands, (pumps)

In 1976, Matériel Auxiliaire Marine et Industriel S.A.R.L. with a capital of 20.000 Francs, better known as M.A.M.I.