What happened Tuesday should have been a good day for investors in the cruise ship sector. Bright and early this morning, analysts at investment bank JPMorgan raised their price targets across the industry, predicting that within a year, Carnival Corporation (NYSE:CCL) (NYSE:CUK) stock will sell for $33 a share, Norwegian Cruise Line Holdings (NYSE:NCLH) will rise to $36, and Royal Caribbean (NYSE:RCL) will hit $110 a share. But then Norwegian Cruise dropped a weapon in the water and torpedoed the stock rally. As of 11:30 a.m. EST, Carnival stock is down 3.1%, Norwegian is down 3.3%, and Royal Caribbean is...