The phrase "how old is the Norwegian Sky cruise ship" is a noun phrase that inquires about the age of a specific vessel. For instance, "how old is the Norwegian Sky cruise ship?" is a common question asked by individuals interested in booking a cruise or researching the history of the ship.
Knowing the age of a cruise ship is important as it can provide insights into its maintenance, safety features, and overall condition. Older ships may have undergone renovations and upgrades to keep up with industry standards, while newer ships may offer state-of-the-art amenities and technologies. A significant development in the history of cruise ships was the introduction of the Norwegian Sky in 1999, marking a shift towards larger and more luxurious vessels.