KDR&ZV — short for Koninklijke Dordrechtsche Roei- en Zeil Vereeniging — is a royal rowing and sailing club based in Dordrecht. Its marina, the Nieuwe Haven, serves as the club's main access point on the Oude Maas, one of Europe's busiest inland waterways.

Despite its active shipping traffic, the harbor is accessible to smaller vessels as well. The Nieuwe Haven is a tidal harbor, and entry requires passing through a bridge that must be operated on request; a waiting berth is available just outside.

The club operates three sections — rowing, sailing, and the harbor itself — and maintains berths for both sailing and motor boats.