Cruise line

They may include alcohol and shore excursions, sometimes on additional payment.

The business has been extremely volatile; the ships are massive capital expenditures with very high operating costs, and a slight dip in bookings can easily put a company out of business.

Cruise lines frequently sell, renovate, or simply rename their ships to keep up with travel trends.

Brands exist partly because of repeat customer loyalty, and also to offer different levels of quality and service.

For instance, Carnival Corporation & plc owns both Carnival Cruise Line, whose former image were vessels that had a reputation as "party ships" for younger travellers, but have become large, modern, yet still profitable, and Holland America Line, whose ships cultivate an image of classic elegance.