David recently created this design for a mini-ROV. The concept is for a small ROV with a four to five inch diameter pressure vessel (sketch not to scale) that can be launched from a larger ROV. The diagram shows a complete mini-ROV using a single motor for propulsion and a parallel up/down-right/left rudder system with linkage controlled by stepper motors. The mini-ROV has a video camera in the front dome with lighting and blue LED’s. In the middle, circuitry can be seen for the stepper motor controller, motor speed controller, video-to-fiber converter and at the top a fiber controller with a cable back to the main ROV (including power).