Risk Levels Of Various Activities: COVID19: Chart & An Article

The article describing the expertise of the authors and they reasons they categorized the activities as they did:

https://www.mlive.com/public-interest/20...risk-level.html

Pontoon boat rides? Has anyone here ever been on one? I have one and spend most of my time at a house on a massive lake, where many people have them or other types of water crafts. Even with no virus, people are usually at least a football field away from each other on the water. It is somewhat safe to assume that people going on a boat together would be together elsewhere anyway. I'm surprised to see a pontoon boat make the list. It makes wonder about the author's credibility.