Answer:
I would immediately find a drinking water source from the ocean, find some wood so I can make a fire, I would also take a stick so I could write SOS on the sand so If a helicopter goes by, they can see that I need help.
Step-by-step explanation:
It is best that if you know you're going on a boat trip or a cruise, you should carry most important stuff inside 1 backpack. Because, if you get stranded on an island with every other suitcase you brough on the ship and they're lost, you may not be able to survive. In a bag, I would carry a water filter so I can filter the dirty water, I would carry some snacks and food that's enough for a week, I would have a water bottle, I would carry some clothes too.