Do personal buoys such as the one pictured work in waters were

Hard skin mooring buoys have a seamless and tough one-piece polyethylene shell Hard skin shells feature ultraviolet light absorbers for long-term life

Taylor Made Products, Sur-Moor T3C Mooring Buoy, Seamless, Foam Filled

Types of buoys for boats and their meanings

Moorings & Buoys - Woods Hole Oceanographic Institution

New Wave Swim Buoy is a Swimming Safety Float and a Trusted Companion for Open Water Swimmers that has a built in Drybag., It provides:, Visibility

New Wave Swim Buoy - Swim Safety Float and Drybag for Open Water Swimmers, Triathletes, Kayakers and Snorkelers, Highly Visible Buoy Float for Safe

Buoys Float On Top - But They Protect The Bottom

5 Basics of Buoys - Boomarine

5 Man Overboard Safety Devices Tested

Are sailboats able to be put on boat lifts? : r/sailing

Buoys Float On Top - But They Protect The Bottom

What do all those buoys and markers mean? - Dorset Marine Training