ok, I'm glad I looked in the boardgame rules now. I can see the process for conducting a Naval battle and this is generally followed in the computer game but with significant differences. I think these differences should be corrected otherwise the Naval game is unbalanced. I have tried to carry out some tests with Naval battles but have hit another issue regarding Naval combat modifiers which appear not to work. I will post in the main forum when I have worked out what I think is not working.