SIGMA SEVEN

A desire for a strong righting moment heavily influenced the design of project ΣVII. SIGMA achieved this through a balanced system of floatation and ballast. The float, machined from a block of high-density polyurethane foam coated with a thin layer of carbon fiber, is mounted at the top of the machine. The volume of the float was carefully calculated to give the ROV neutral buoyancy. To create the stiff righting moment desired, ballast is added to the lower portion of the ROV. This creates maximum stability even at high speeds. Because of the balanced nature of the ROV, project ΣVII is able to lift heavy objects and maneuver with ease.