Then I will stick with my choices.

Fire up the PLB, string up the tarp to the one tree for shade after I make sure no coconuts will fall on my head, crack open some of my abundant water supply and have a nice drink.

Take a dip to cool off and see if there is anything to eat that is readily harvestable in the water right off shore. Have a coconut.

Drink more water. Wait for rescue by cruise ship?