Thank you for jogging my memory! I rechecked the excursions for our 10/2 Lisbon- Barcelona cruise and found they had added a great Catamaran cruise in Cadiz (instead of a "Panoramic Tour").
Another option post-cruise might be to take advantage of the airlines' lounges, either as a perk of your flight or to buy your way in. Usually not a bad way to spend several hours pre- flight.
On Navigator now, ladders only. Deep end 6 ft, "shallow" end listed as 3.1 ft probably closer to 4 ft actually. Was drained yesterday due to rough seas. Day before that was a exciting wave pool!