Something worth reading on science denial, about that public domain music on YouTube, and in the "Great strides in human powered transportation" department...
Since I have some sanding and various other uninteresting work calling, I'll add a factoid to the whole bicycle as power source for your boat discussion.
"Most recreational cyclists generate about 0.35 hp for a sustained (2 hour) ride."
You can get deeper into the subject here and, at least for me, I find the whole subject of bicycle efficiency somewhat riveting stuff.
Listening to Molly Tuttle and Nathaniel Rateliff
So it goes...