What vessels must have a throwable PFD on board?

All recreational vessels 16 feet and longer must carry a throwable personal flotation device (PFD), commonly referred to as a Type IV PFD. This requirement applies to boats such as motorboats, sailing vessels, and personal watercraft. Additionally, some states may have their own specific regulations regarding throwable PFDs, so it's important to check local laws. Always ensure the throwable PFD is easily accessible and in good condition.