 For the second day in a row, cruise line stocks are full speed ahead and racing for the open sea. Yesterday, a better-than-expected revenue report out of Royal Caribbean NYSE: RCL sparked a rally across the cruise line sector. The momentum is carrying into this afternoon, with Royal Caribbean shares gaining another 4.3 through 12:15 p.m. EDT, Carnival Corporation NYSE: CCL lagging just a bit with a 3.6 gain, and Norwegian Cruise Line Holdings NYSE: NCLH up a solid 6. 