Thats whats strange...I have everything turned off that is possible to turn off.
In your home harbor in 1024x768 mode I get 35-40 fps..at sea I get 150-180 fps.When I attack a convoy it never drops below 60 fps.
Yet let me turn to 1280x1024 and I get 18 or less fps in home port...40 and less at sea..and in a convoy attack forget it...I think it drops to negetive numbers once ships start burning.
Its been awhile since I tried it so i may try it again since I recently did a fdisk and reformat/re-install of my system and Windows.