A flotation device is anything that keeps a person afloat. Throw a flotation device.
Throwing one is safer than swimming out, since a drowning person will climb on a rescuer. A flotation device does not have to be designed as one, and a cool box has done the job.
1nounflotation deviceAnything that keeps a person afloat.
“The flotation device reached him on the second throw.”
flotation device is equipment.
Practised in Emergency & Rescue