The Rotterdamsche Droogdok Maatschappij (RDM) was the largest pre-World War II shipbuilding and repair company in Rotterdam in the Netherlands, existing from 1902 to 1996. It built 355 mostly major seagoing vessels, 18 of which were submarines. During its existence, the wharf operated 12 floating docks and in its heyday employed 7,000 people at one time.

HNLMS Dolfijn (S808) is a Walrus-class submarine of the Royal Netherlands Navy. She entered service in 1993 as the third submarine of the Walrus class, after HNLMS Walrus and HNLMS Zeeleeuw. Dolfijn has been deployed both for naval exercises and in combat operations around the world. Furthermore, the submarine plays an important role by performing intelligence operations.