New Dining Options and Entertainment Concepts Introduced Onboard. Royal Caribbean International’s Serenade of the Seas has reemerged from its three week $29 million drydock at Navantia Ship Yard in Cadiz, Spain, with a host of new dining concepts, entertainment options and technology advancements originally introduced to industry-wide acclaim aboard Oasis-class ships. Serenade of the Seas, a Radiance-class ship, is the eighth ship overall to undergo revitalization since the line announced an extensive revitalization program in 2011 which will leave no ship untouched. Guests interested in sampling these new venues will have the opportunity to choose from one of the new dining packages recently introduced.