Board a conventional wood boat for a classic caldera tour, give up for swims, seek advice from the volcano
https://riverslvh281.capitaljays.com/posts/best-santorini-tours-from-cruise-ship-fast-track-shore-excursions-with-pickup-and-drop-off-3
Board a usual wood boat for a basic caldera journey, forestall for swims, talk over with the volcano, and experience onboard reviews and snacks.