I happen to be from greece and live near averof's visiting place. I visited averof both as a civilian and as an NCO of the greek navy (for watch duty). Averof has a long history assosiated with interesting battles such as the ones in lemnos and elli. You can find some info on
http://en.wikipedia.org/wiki/Naval_Battle_of_Lemnos. Now regarding the dradnought project the guy working on it has done a very interesting modelling of the instrument utilised by royal navy for naval artillery ranging and direction. It is a rather complicated instrument but trust me it works pretty accurately (tried it in the simulator). Also as far as the plans mentioned besides submarines it also has some interesting ships of the WWII era such as Prinz Eugen (A hipper-class heavy cruiser with history tied to the Bismarck) and many other.
Edit: It is not HMS Averof but rather HS Averof (Since it never had anything to do with the RN)