Following his discovery of the wreck site, Ballard returned to Titanic in July 1986 aboard the research vessel RV Atlantis II. Now the deep-diving submersible DSV Alvin could take people back to Titanic for the first time since her sinking, and the remotely operated vehicle Jason Jr. would allow the explorers to investigate the interior of the wreck. Another system, ANGUS, was used to carry out photo surveys of the debris field.[40] Jason Jr. descended the ruined Grand Staircase as far as B Deck, and photographed remarkably well preserved interiors, including some chandeliers still hanging from the ceilings.[41]