A steering wheel provides a control device that is easily maneuverable, by one hand, by an operator who is gripping the rim of the steering wheel. Release of the rim is not necessary to affect a change in the control parameter of an engine or other element of a marine vessel through use of the control device. The control device is rotatable about an axis of rotation which is generally parallel to a line which is tangent to a centerline of the rim of the steering wheel.

 
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