Scanned with 3D Live Scanner and the Samsung Galaxy S21 Ultra.
From https://en.wikipedia.org/wiki/Lifebuoy:
"In the United States, Coast Guard approved lifebuoys are considered Type IV personal flotation devices. At least one Type IV PFD is required on all vessels 26 feet or more in length.
Leonardo da Vinci sketched a concept for a safety wheel, as well as for buoyant shoes and balancing sticks for walking on water."