 A Hybrid ROV (HROV) combines features of both ROVs and AUV, operating independently or with a cable.was employed in 1985 to locate the wreck of ; the smaller was also used to explore the shipwreck.In 1974, "Alvin" (operated by the Woods Hole Oceanographic Institution and the Deep Sea Place Research Center), the French bathyscaphe "Archimède", and the French diving saucer "CYANA", assisted by support ships and , explored the great rift valley of the Mid-Atlantic Ridge, southwest of the Azores.