I think that Damn the Defiant is actually my favourite naval film, although the Cruel Sea takes some beating (realistic and downbeat), and those old b&w submarine films with John Mills etc. More recently, the Hornblower series and Master and Commander. Really one is spoilt for choice.
Although as a Hollandophile I was looking forward to seeing the de Ruyter film, I found it disappointing, spoilt by an excess of techonological wizardry and rather crass script. The main part was well played.