You will need:
Embarkment day clothes Embarkment day first dinner clothes Day 1 Sea Day Morning outfit Day 1 Sea Day Pool outfit Day 1 Sea Day casual wear Day 1 dinner clothes Day 2 first stop breakfast/lunch excursion outfit Day 2 post day activity relaxation outfit Day 2 Formal Evening dinner attire outfit Day 2 Post formal even dinner attire outfit Day 3 second stop breakfast/lunch excursion outfit Day 3 post day activity relaxation outfit Day 3 Dinner and after dinner outfit Day 4 Sea Day Morning outfit Day 4 Sea Day Pool outfit Day 4 Sea Day casual wear Day 4 dinner clothes Disembarkation day outfit
Total outfits/changes of clothes needed: 18 separate outfits. You will also need a few bathing suits