Marina will be Oceania’s first ship to resume sailing as part of a phased resumption this summer.
The 1,250-guest ship will sail Scandinavia and western Europe under new health protocols.
It will resume is originally published schedule, starting 29 August with a sailing from Copenhagen.
"The entire Oceania Cruises team is excited to now shift our focus to safely restarting operations and ultimately welcoming back our guests to begin exploring the world once again," said Oceania president and chief executive Bob Binder.
Oceania said phased restart dates for the rest of the Oceania fleet would follow shortly; itineraries will be subject to port availability, and could be "adjusted as needed" closer to sailing dates.
The line’s new SailSafe health protocols include a vaccination requirement for all guests and crew; regular testing; and additional pre-embarkation health screening.
Capacity will be limited, while face coverings will be required for guests while indoors – except when in their own accommodation, or eating and drinking in restaurants, bars and lounges.
Masks will be required outdoors when physical distancing is not possible, and will also be required at other stages of the journey, such as time spent in the cruise terminal and during disembarkation at ports of call.
There will also be contactless food service ship-wide, increased hand sanitation facilities and requirements, and onboard health monitoring for guests and crew, as well as enhanced cleaning and sanitation throughout the ship, overseen by a dedicated public health officer.
Each ship will also have an infectious disease prevention officer onboard.