Margaritaville at Sea Islander is a Spirit-class cruise ship previously owned by Carnival Corporation & plc.

[5] She was decorated with Carrara marble, Murano glass accents, and in-laid mosaic tiling, as with Costa Luminosa.

[7] The ship entered service with Costa in 2000, with Caribbean itineraries during the northern winter, European cruises in the summer, and in the East Coast United States and Canada area during spring and fall.

On 4 December, Margaritaville at Sea revealed that the ship would receive a total makeover before entering service in June 2024.

[14][15] Renamed Margaritaville at Sea Islander, the ship began a four-month refit in January 2024 at the Harland & Wolff shipyard, Belfast.

[a][22] A doctor had collected samples from four suspected cases and conducted PCR tests, with three negative results and one positive.

[21] Costa Atlantica had 623 crew members of 36 different nationalities, including a Japanese translator and no passengers at the time the first positive case was first reported.