The contribution presents the MetaSeis Project. Aim of the project is to develop a unifying data infrastructureand prepare for future archival of reflection 3D seismic data and active OBS data from recent and futureresearch cruises. We aim to adopt and extend existing standards and interoperable vocabularies in theseismic metadata including metadata quality and validation checks. To ensure long-term archival in thedigital library system "PANGAEA" according to the FAIR-principles, a workflow for the integration of future andlegacy data sets is established. The contribution presents the way in which the Alfred Wegener Institutemakes its seismic data visible and accessible, and the difficulties that arise. Aim is to visualize the marineseismic profiles measured to date on maps via track lines and to make the corresponding data accessible tothe geoscientific community via data archive "PANGAEA" as part of the "Open Access Agreement".For a firstoverview the online portal https://marine-data.de presents the location of the acquired seismic profiles, anddisplays meta data as expedition data, contact persons, descriptions of the surveys, and a link to the cruisereport. JPG-Images are provided for some significant seismic profiles. These maps can be quickly updatedafter new expeditions to keep the community informed about where data has been collected and where thereare still gaps.In a second step the Marine Data Portal is linked to the data archive “PANGAEA”. The data itselfcan be accessed there within the scope of the “Open Access Agreement”. The “PANGAEA” archive providesthe basis for the data to be permanently visible to the scientific community and to be digitally available forfuture projects. Another major advantage is that the data is assigned a DOI, which is becoming increasinglyimportant for the submission of publications, research proposals and other applications.