Inboard-powered wakesurf boats create waves with more volume and, thus, more power. Water ballast systems allow the boats to take on hundreds of gallons of water, creating a deeper hole behind the boat. The nearly flat bottoms of these boats also result in waves better suited to surfing. Also, these boats are often fitted with an array of trim systems that allow the captain to adjust and refine the shape of the wake. Forward Drive-powered wakesurf boats rely on drive trim and trim tabs to create surfable waves. However, when surfing is over, the deep-V hull, combined with the low drag of a sterndrive drivetrain, allows for fast, smooth transport across choppy waters.