By Daniel Kline The cruise line continues to raise the stakes in its battle with Norwegian and Carnival. When Wonder of the Seas began sailing from Fort Lauderdale in March, it claimed the title of the largest cruise ship in the world. It took that crown from its sister ship Symphony of Seas, which began sailing in 2018. In reality, Royal Caribbean has dominated the “biggest cruise ship in the world” competition, essentially trading that title between the previous Oasis-class ship and the next one. The Oasis class debuted with Oasis of the Seas in 2009. “Oasis of the Seas was the largest cruis…