Some land-based miniature wargames have also been adapted to naval wargaming. All at Sea, for example, is an adaptation of The Lord of the Rings Strategy Battle Game rules for naval conflicts. The game's mechanics centered around boarding parties, with options for ramming actions and siege engines. As such, the ship's scale ratio corresponds to the 25 mm scale miniatures used by The Lord of the Rings. Model ships are built by hobbyists, just as normal miniature terrain, such as " great ships " of Pelargir, cogs of Dol Amroth and Corsair galleys.