CORPUS CHRISTI, Texas, (May 26)--The Coast Guard issued the certificate of inspection May 26 for the Deep Draft Caisson Vessel built by Exxon Mobil Corporation for oil production in the Gulf of Mexico's Hoover and Diana oil fields. At 75 stories tall and moored in 4, 800 feet of water, the Deep Draft Caisson Vessel, or DDCV, is the world's deepest drilling and production platform. USCG Photo by Lt.j.g. Brian Moore