The Federation of Maritime Workers (Dutch: Federatie van Werknemers in de Zeevaart, FWZ) was a trade union representing sailors in the Netherlands.
The union was founded in 1967, when the recently-founded General Association of Seafarers merged with the Central Organisation of Sailors and Fishermen.
Originally named the Federation of Workers' Organisations in Maritime Shipping, like both its predecessors, it affiliated to the Dutch Confederation of Trade Unions (NVV).
[1] In 1969, its fishing section transferred to the Dutch Transport Workers' Union, but in 1970, it was joined by the Association of Captains and Officers of the Merchant Navy.
At the same time, it created FNV Waterbouw, as a joint venture with the Construction and Wood Union, to represent marine engineers.