P&O Cruises ArviaYear Built: 2022Decks: 16Passengers: 5,200Size: 184,700 tons P&O Cruises BritanniaYear Built: 2015Passengers: 3,600Size: 141,000 tons P&O Cruises IonaYear Built: 2020Decks: 16Passengers: 5,200Size: 184,700 tons Lindblad Expeditions Natl Geographic ExplorerYear Built: 1982Refurbished: 2023Decks: 6Passengers: 148Size: 6,471 tons