By Michael Tedder Cruise fans, bring your appetite. For the cruise industry, the worst part of the covid pandemic is well in the rear view mirror (knock on wood). But that doesn’t mean that challenges have not lingered. All three of the major cruise lines, Carnival Cruise (CCL) – Get Carnival Corporation Report, Royal Caribbean (RCL) – Get Royal Caribbean Group Report and Norwegian Cruise Line (NCLH) – Get Norwegian Cruise Line Holdings Ltd. Report closed as soon as the covid pandemic hit in March of 2020, and stayed closed for a year. All three of them spent millions of dollars refurbishing t…