Here is what I found on the Royal Caribbean site:
Rock-Climbing Walls Coming Soon To A Cruise Ship Near You
Royal Caribbean Announces Plans to Outfit Entire Fleet with Signature Rock-Climbing Walls
Miami - March 18, 2003 - Royal Caribbean International, the cruise line that redefined traditional expectations of cruising by putting rock-climbing walls onboard its newest cruise ships, today announced plans to offer the popular feature fleetwide by November 2003. First introduced on Voyager of the Seas in 1999, the rock-climbing walls quickly captured national interest and became a star attraction on each new Royal Caribbean ship that followed. The line’s current plans call for the walls to be retro-fitted on ships launched before 1999, and be installed on three Royal Caribbean ships scheduled to debut in late 2003 and spring 2004.
"Over the past few years, the rock-climbing walls have become a brand icon for us," said Dan Hanrahan, senior vice president, Marketing and Sales, Royal Caribbean International. "They reflect a new attitude toward cruising and epitomize the innovations and unexpected experiences guests enjoy on a Royal Caribbean vacation. We offer many different ways for travelers to ‘get out there’ whether it’s snorkeling with stingrays or simply trying a new wine at Chops Grille steakhouse or a new regional Italian dish at Portofino’s, but increasingly the rock-climbing walls have become the symbol of the active, adventurous spirit we are known for."
Perched on the top decks, the rock-climbing walls challenge guests to reach new heights and reward them with an unparalleled, bird’s eye view of the ship, sea and sky. On Voyager-class vessels, the top of the walls are nearly 200 feet above the ocean. The walls are designed to suit both beginners and advanced climbers. Lessons are offered on every sailing by trained ship staff.
Fleetwide installations begin in late May with Monarch of the Seas, which will be refitted before arriving in her new homeport of Los Angeles. The remainder of the ships will be outfitted with rock-climbing walls by the end of the year: Majesty of the Seas (June); Sovereign of the Seas (July); Rhapsody of the Seas (August); Enchantment of the Seas (August); Vision of the Seas (October); Grandeur of the Seas (October); Splendour of the Seas (October); Nordic Empress (November); and Legend of the Seas (November).
Royal Caribbean International is a global cruise brand currently with 16 ships in service and three more under construction or on firm order.