This International Standard contains the requirements and test methods for the production of an ECS Database. It addresses the elements of the database relevant to safety of navigation including content, quality and updating. This International Standard provides guidance on production and testing of an ECS Database. It does not provide detailed coverage of the methods and techniques required for database design and development, nor does it address specifc quality management procedures. The main users of this International Standard will be ECS Database producers. ECS manufacturers and national regulatory authorities may find the guidance in this International Standard relevant.