Passengers aboard the 'Carnival Conquest' cruise ship returning from a 7-day Caribbean vacation got an unexpected detour to Mobile, Sunday, a diversion required by the closure of a 10-mile stretch of the Mississippi River, reports 'The Times-Picayune'. The US Coast Guard reports that they received a report Saturday at 12:10 p.m. from a passenger vessel near the 48-foot tug boat C-Pec that capsized and sank in the river at mile marker eight above Head of Passes near Venice. The U.S.