HNLMS Piet Hein (F811) () was a frigate of the . The ship was in service with the Royal Netherlands Navy from 1981 to 1998. The frigate was named after Dutch naval hero Piet Pieterszoon Hein. The ship's radio call sign was "PAVM".
Dutch service history HNLMS Piet Hein was built at KM de Schelde in Vlissingen. The keel laying took place on 28 April 1977 and the launching on 3 June 1978. The ship was put into service on 14 April 1981.
On 8 February 1982, the ship, with the frigates , , , the destroyer Overijssel and the replenishment ship , departed from Den Helder for a trip to the United States to show the flag and for 200 years diplomatic relations. The ships returned to Den Helder on 19 May 1982.
In 1998 the vessel was decommissioned and was sold to the United Arab Emirates Navy.
United Arab Emirates service history The ship was commissioned on 27 June 1998 to the United Arab Emirates Navy where the vessel was renamed Al Emirat. Al Emirat was decommissioned in 2008.
Conversion to yacht
Construction work started at ADMShipyards of Abu Dhabi in 2009 to rebuild the ship into a private superyacht named Yas. The ship was relaunched in 2011 and delivered in 2015. At in length she is one of the largest motor yachts in the world.
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