Corvus Ancient Naval Rules

Corvus is a set of free wargames rules for fighting ancient sea battles.

Renaissance Naval Rules

David Heading offers a set of Renaissance Naval Rules.

Togo Russo Japanese Naval War Rules

Togo is a set of free wargames rules for naval battles during the 1904 – 1905 Russo-Japanese war.

Schnell Rules For Schnell Boote!

Schnell Rules is a set of fast play rules for WW2 coastal forces.

Trireme Ancient Naval Rules

Trireme, from Andy Watkins, is a set of free naval wargames rules. These are of the one-page variety, which means that there is much to recommend them. I also like the staggered movement system based on boat speed, which reminds me of the old Car Wars system.