It would seem that Indy could follow the same pattern as the Explorer dry dock, when they added the deck 12 cabins. The ship took on workers at both Port Everglades and materials at the Bahamas with work progressing as the ship crossed to Cadiz. There they released many of the ship's crew for vacation and more workers boarded to finalize the work prior to sailing up to Southampton from Cadiz.Pretty sure Explorer already has the Deck 12 cabins added.
RCI will most likely not return to Rotterdam for any dry dock due to the Oasis labor incident. Relatively the fine was very low though and they may have just built that into the cost of the Oasis revitalization. When a ship is at sea for dry dock, the labor laws are very relaxed for the 'hotel' crew that is now used to do 'light' work during the revitalization.
Now that they are bringing Mariner to dry dock at Freeport, Bahamas to get the Liberty enhancements prior to entering service year round from Miami, it would make sense to use Cadiz to add the deck 12 cabins to Indy as the cabins are prefabricated in Europe. That order can now include Explorer, Adventure and Mariner, which will all most likely have all the deck 2,3 and 12 cabins added.
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