MIAMI — Crystal River Cruises is extending its vaccination requirement for all passengers and crew through December 2022.

The line’s updated Crystal Clean+ health and safety protocols will continue to require all passengers and crew to be fully inoculated with a COVID-19 vaccine (with both doses, if recommended by manufacturer) at least 14 days prior to their embarkation date.

Passengers will need to provide documented proof of vaccination at the time of check-in before boarding the ship.

“The health and safety of our guests and crew is paramount to everything we do at Crystal River Cruises, and as such, we will require full vaccination through 2022 so that our guests can continue to explore the world in great comfort and safety,” said Walter Littlejohn, Crystal River Cruises’ senior vice president and managing director.

“After months of planning and preparation we welcomed guests back on board in late August and the feedback has been wonderful. Extending the vaccination requirement provides our guests with the health and safety information and assurances they need to plan future travels,” he said.

The vaccine requirement bolsters the cruise line’s Crystal Clean+ measures, including COVID-19 tests at embarkation for passengers and crew, temperature checks when returning from ashore, a nimble mask policy, social distancing guidelines, enhanced cleaning and disinfection measures and more. Crystal River Cruises’ crew wear masks in all public areas to provide yet another layer of passenger protection.