the turrets look similar to british design, to be more precise, they look a lot like Lion's/KGV's turrets. They are also too small/light for 42cm turrets, in my opinion. The guns itself should be widened by 1 pixel.
very nice! agree with eswube 100% - a topview would be the crowning! BTW: general question: when an artist would take the topview of a ship whose sideview was drawn by another artist, how to handle this issue? In each case must the permission of the artist be granted?