[Strategia_In_Ultima]

Is this that "naval" mod you started a thread about a month or so back? If so, I'm interested.

For starters, I'd suggest removing all ship sizes and components, and starting over from scratch - as SJ said - and using some book/internet sources of info about naval transportation and warfare. Once that is over, you've got an excellent start, and you can then proceed to the "poke-n-edit" mode using this basic template to poke at.