Norwegian Cruise Line has announced plans for the world’s first at-sea tweetup for cruise-loving social media enthusiasts. The SeaTweetup will be a three-night cruise around the Bahamas and is billed by the organizers as the world’s meeting for Twitter users at sea. The cruise, departing Miami on November 18, will be hosted by Norwegian Cruise Line’s 2,002-passenger Norwegian Sky and is organized by, among others, social media TV show SocialBuzzTV and digital media consultants Social Esquire.