Carnival Corp has offloaded the second ship in its fleet to carry the "Love Boat"-famed Pacific Princess name to an undisclosed buyer.

The Arnold Donald-led cruise major has sold the 670-berth ship (built 1999) as part of its "plan to accelerate the removal of less efficient ships from its fleet", it said on Thursday.

New York-listed Carnival on 11 January said it planned to shed four more vessels after offloading 15 others in an effort to survive a pandemic that last year took billions of dollars from the cruise sector.

Carnival has not disclosed the names of the other three ships and has not said if it will carry on the Pacific Princess name in a third ship.

Other ships that Carnival may sell include the 1,186-berth AIDACara (built 1996) and 1,248-berth AIDAMira (built 1999), according to industry insiders.

Pacific Princess first joined Carnival's Princess Cruises fleet, which now has 14 ships, in 2002 after entering service under the name R3 for Renaissance Cruises.

The ship carried on the name of the original 750-berth Pacific Princess (built 1970), which appeared in the 1970s romantic comedy "Love Boat" from 1977 to 1986.

"Pacific Princess holds so many memories and cherished experiences to all who sailed upon her," Princess Cruises president Jan Swartz said in a statement.

Gavin MacLeod, who played the Love Boat's Captain Stubing, was on the ship's navigation bridge as it sailed under the Golden Gate Bridge to start its 2003 inaugural season.

Twelve years later, the Love Boat's entire cast appeared on the 1999-built Pacific Princess to celebrate Princess Cruises' 50th year in operation.