Seabourn—one of the leading names in the world of ultra-luxury cruising and expedition travel—has this month announced the sale of a second O-Class ship to Mitsui Ocean Cruises, following the sale of Seabourn Odyssey in 2023.

You may be wondering what you should pack in your suitcase and what kind of clothing to wear whilst onboard a luxury ocean cruise. This article unpacks different dress codes for different cruise lines; what you should wear on board, and when.