HrMs De Ruyter (F804) is a De Zeven Provinciën class frigate.
The De Zeven Provinciën class frigate are highly advanced  air-defense frigates in service with the Koninklijke Marine (Royal Netherlands Navy). This  class of ships is also known as LCF (Luchtverdedigings- en  commandofregat, air defense and command frigate). The ships are very  similar to the German Sachsen class frigates. 
The ships are classified as frigates by the Netherlands Navy but  internationally are classified as destroyers as this better fits their armament  and role.
 She was commissioned into service on the 22nd April 2004, she has a complement of 174 (227 including command staff), is 144.24 m long, with a beam of 18.80 m and a draft of 5.18m.  She displaces 6.050 tonnes (full load) and her top speed is 30 knots.
HrMs De Ruyter (F804) was previously commanded by Commander Jeanette Morang.  She was the first woman to command a Netherlands Navy  frigate. 
She is seen here alongside in Leith on Friday 18 June 2010
Her sister HrMs De Zeven Provinciën is seen here arriving Leith on the 10th April 2010
And again arriving Leith 7th February 2003