Complex sentence: The design is characterized by a wide, flat bottom, flared sides, a narrow, flat bow, a pointed stern, and extreme rocker in the bow and stern to allow the boat to spin about its center for ease in manoeuvring in rapids.
Split into simpler sentences: The design is characterized by a wide, flat bottom, flared sides, a narrow, flat bow, and a pointed stern. It is this constant rocker that allows the boat to spin about its center for ease in maneuvering in rapids.