The missions of the SML76 revolve around three main areas. First, the syndicate is responsible for the coordination and development of a concerted coastal strategy (GEMAPI and coastal retreat), seeking to foster climate change adaptation along the coastal fringe of the Seine-Maritime Department (from Le Havre to Tréport). 

Secondly, it is involved in the coordination of actions for the prevention of marine submersion (GEMAPI) and the redevelopment of coastal river outlets to restore ecological continuity;

Finally, it contributes to the maintenance and monitoring of seafront protection and beach maintenance infrastructures, as well as several port facilities.

The SML contributes to building capacities. It promotes the elaboration of a strategy to foster a risk culture along the Seine-Sea shoreline meanwhile it implements communication and awareness raising activities. 

In addition, a Coastal Commission is being structured as a fully-fledged body of the SML76, whose mission will be to define a comprehensive coastal management strategy. Considering that the actions carried out by the SML76 will potentially impact all the actors on the coast, the commission will gather members of the SML76, State services, Universities, economic actors, and schools. It will become an interface for dialogue between all the stakeholders involved, closely or remotely, in the adaptation of the coast.