The definition of Fractional Ownership is explained almost the same by every Fractional Ownership program. It is not a timeshare!
Simply put, Timeshare means you do not own a share of the property, merely the right, to use the property for a set period of time, then its over. Fractional Ownership you own the asset and receive a deeded title reflecting your ownership. If you decide, you can sell your share of the yacht whenever you want.