We had a very small group as several participants canceled on short notice. When you check in they set you up with your snorkeling gear, then once they get the Zodiac launched, you head to the dock. We stopped at two beautiful snorkeling spots for about 45 minutes each and had snacks after each stop. The captain also stopped along the way at different lava formations from past eruptions, so we saw some lava tubes, caves, and arches. It was a wonderful experience and I recommend it highly!