Board a conventional timber boat for a vintage caldera excursion, discontinue for swims, go to the volcano
https://www.scribd.com/document/1036687577/Santorini-Luxury-Tours-Yachts-Helicopters-and-Five-Star-Tastings-135232
Board a regular picket boat for a basic caldera journey, quit for swims, talk over with the volcano, and appreciate onboard experiences and snacks.