graphical user interface
as defined in Regulation (EU) 2019/1239 of the European Parliament and of the Council of 20…, Article 2, point (9) (Definitions)
a web interface for two-way web-based user-to-system data submission to a maritime National Single Window, allowing declarants to enter data manually, inter alia, by means of harmonised digital spreadsheets and functions that enable reporting data elements to be extracted from those spreadsheets, as well as including common functionalities and features that ensure a common navigation flow and data upload experience for the declarants