A Wasserstraßen- und Schifffahrtsamt (Waterways and Shipping Office, abbreviated WSA) is a German federal agency, responsible for the administration of federal navigable waters and for the regulation of vessel traffic.
The seventeen offices (plural: Wasserstraßen- und Schifffahrtsämter, abbr. WSÄ) are supervised by the national Wasserstraßen- und Schifffahrtsverwaltung des Bundes (WSV – Federal Waterways and Shipping Administration) and accountable to the Federal Ministry for Digital and Transport. In total the offices cover 23,000 km2 of maritime waters and 7,350 km of inland waterways.[1][2]