There are rules for large map games in the book. Page 48, "Long Distance Battles".
We can play with those, although I’m I don’t think I’m as crazy about just how massive the map is....
Formerly "Admiral Jacky Fisher."
"It follows then as certain as that night succeeds the day, that without a decisive naval force we can do nothing definitive, and with it, everything honorable and glorious"--George Washington