Scott Truver's "Tomorrow's Fleet," (see September 1997 Proceedings. pages 90-96) discusses Navy plans to design advanced surface combatants for the 21st century-plans that hardly are revolutionary.
At the turn of the century, several warships already employed a turtleback hull form that incorporated severe tumblehome and a cutaway bow. The turtleback hull form soon disappeared because of inadequate seakeeping performance and limited reserve buoyancy. Subsequent generations of merchant ships and warships generally had conventional above waterline hull forms. From a seakeeping and powering standpoint, the best performing high-speed displacement hulls featured above-waterline hull flare, full waterplanes, good freeboard, and gently flared bows designed to keep the decks dry while minimizing the probability of flare slamming. For warships these design features also contributed to stability, survivability and, recently, stealth.