Engineers at Watershot Inc. (www.watershot.com) recently designed a new underwater camera housing without first building costly prototypes. The enabler: CAD software. The company used SolidWorks to develop the Zuccarini underwater camera housings. In the process, engineers created a gear tower mechanism that transfers the axial motion of the external camera housing controls 90į to the axial rotation of the iris and focus bezels on the lens inside the housing. "The gear tower assembly was the most complex mechanism we had designed up to that point," says owner Steve Ogles.