We are experimenting with concept maps

Concept Maps seem like a good way to represent knowledge about ships, captains, and battles. We have been experimenting with them and Mind Maps (look at FreeMind). This is an example of what a concept map might look like, which shows my first attempt at representing ships, captains, and admiralties. Mind Maps seem well-adapted to structuring information for a book, as ultimately, the result needs to be linear. Concept maps seem more adapted to knowledge representation.

Start of a concept map to show information about ships and captains.