A Carnival ship in the Avalon, California harbor.AaronP/Bauer-Griffin/Getty ImagesThe Baltimore bridge collapse will have a small impact on Carnival's bottom line.Carnival secured a temporary home port in Norfolk, Virginia, to minimize operational changes.Royal Caribbean and American Cruise Line's operations may also be affected.Tuesday's Baltimore bridge collapse may marginally affect the world's largest cruise company.All vessel traffic has been halted at Baltimore's port, stopping both containerships and cruise ships.Josh Weinstein, the CEO of Carnival, addressed the incident at the start of Wednesday's earnings call, thanking emergency services and the Coast Guard.