Onderlinge Watersport Vereniging (OWV) is a Rotterdam-based water sports club founded in 1966 and located on the Emmalaan.

Its marina sits at the Klokplas, one of the Bergse Achterplassen, and accommodates up to 84 vessels ranging from small fishing boats to 10-meter yachts.

The club features a clubhouse with a terrace, open every Sunday afternoon, where members organize activities throughout the year.

A dedicated work jetty is available for boat maintenance, and in winter the club has access to a nearby island where boats can be hauled out for repairs or winter storage.

Members are expected to contribute actively through scheduled work shifts to help maintain the marina and clubhouse facilities.