Cruise Norwegian Cruise Line promotion: Buy one, get one free By Tom Stieghorst / May 01, 2014 Share 1 -- Borrowing from supermarkets, Norwegian Cruise Line has applied the buy-one, get-one-free promotion to a pair of its cruise ships.Through May 11, anyone booking a seven-day cruise this summer on the Norwegian Breakaway or Getaway, the company’s newest ships, will also get a three- or four-day Bahamas cruise on selected dates this fall or winter on Norwegian Sky, one of its oldest ships.The promotion, dubbed “Buy Once, Cruise Twice,” has some restrictions.Holiday dates for the Norwegian Sky are blacked out. The promotion applies to sailings from Sept. 5 to Nov. 21, then from Dec. 1 to Dec. 15 and from Jan. 2 to Feb. 27. The Sky cruise is also nonrefundable and non-transferrable.Breakaway sails from New York to Bermuda in the summer, while Getaway sails the Caribbean from Miami. Each can carry 4,000 passengers. The 2,000-passenger Norwegian Sky departs from Miami.___Follow Tom Stieghorst on Twitter @tstravelweekly.