This line has it roots in the Authenticast/Comet models that were used in World War II for the recognition training of lookouts and pilots. Many have been upgraded and improved with finer detailing. The scale is 1"=100' which means that the model of a battleship that was 800' long, would be 8" long. This is perfectly compatible with 1:1250 (1"=104') models. The models are cast in fine lead-free American pewter and come in kit form. Assembly required consists of placing gun turrets in holes in the deck, crimping the turret stalks and gluing on cranes and catapults ("Crazy Glue" is fine). A "needle" file can be used for smoothing any "burrs" along the hull. Any modeling paint can be used for finishing. They are especially prized by naval wargamers because of their durability.
To review, the term "waterline" means that the models sit on a flat surface looking as though they are sitting in the water. That is, they have no bottom hull.