Abstract: A fin assembly for controlling movement of a buoyant body, including: a base for attaching the assembly to the body; and a fin attached to the base by a hinge, wherein when the assembly is attached to the body, the fin can pivot at the hinge from a first condition to a second condition to allow substantially free rotation of the body in a first rotational direction.
Abstract: A fin assembly for controlling movement of a buoyant body, including: a base for attaching the assembly to the body; and a fin attached to the base by a hinge, wherein when the assembly is attached to the body, the fin can pivot at the hinge from a first condition to a second condition to allow substantially free rotation of the body in a first rotational direction.