Constructions Mécaniques de Normandie (CMN) is a French shipyard in Cherbourg. It employs approximately four hundred employees. Construction is made entirely under covered halls (48,000 square meters of covered facilities) on a total surface of 110,000 square meters.
The site has significantly sized building sheds, one of 161m x 22m and another of 80m x 22m, a slipway for vessels under 700 tons, and a 3000-tonne Syncrolift (lift area of 32m x 90m).