Abstract: The main points of PIANC In-Com WG29 report "Innovations in Navigation Lock Design" are presented. The main changes of lock design concept and methodology in recent 20 years are summarized. Some new advances in the design of filling and emptying systems and lock structures are introduced. Lock design is a multi-objective optimizing process. The design objectives and optimization goals must be assessed in the design. Deterministic approach is now being replaced by risk-based design. And least construction cost will be replaced by life cycle cost optimisation