translate English to French: "Vitally important as the planned maintenance of a ship's machinery may be, all the effort devoted to it is expended in vain if the planning does not contribute to the efficiency and well-being of the maintainer..."
"Vitally important as the planned maintenance of a ship's machinery may be, all the effort devoted to it is expended in vain if the planning does not contribute to the efficiency and well-being of the maintainer…" Amiral Smith, Royal Navy, 1775.