Drifting off topic into meaningless waters. My wife owns all kinds of stuff that is clearly hers and not mine.
Are you arguing that I own 50% of her bras? You are "all wet"!
My mother has passed on, but she without a doubt owned the sailboats in my family. She grew up on sailboats and loved them to the end. My dad supported her in every way. He was more of a fisherman than a sailor. My mom was really in charge when we were sailing. When we were out of sight of land or in fog, I had total confidence in her ability. Wish I could do it all again and pay attention to what she was trying to teach me.
"Primary ownership" (OP) is not the same as "sole ownership". Interesting that the word "ship" is in the word ownership!