Jutland: The Rules of the Game
Rules for fighting very large scale WWI fleet actions with very small ships.
We used these rules for a disguised refight of the invasion of Norway, set in February 1917. After comments by players that the gunnery was too deadly at long range (even though we only had half a dozen dreadnought sunk – not a huge toll by any means), I shifted the fire table to d10s, and it really needs replaytesting in this form.