What is the main advantage of a type iv pfd? Type IV PFDs (throwing devices such as life rings or floats) can be any approved device that is designed to be thrown at people in the water so that they can grab and hold onto it until they are rescued. Throwable devices must have a rope for retrieval purposes. These devices do not offer thermal protection but allow individuals to partially lift themselves out of the water. Lifebuoys must be kept within easy reach for dropping to crew members who have fallen overboard. The addition of a flagpole, waterline, PFD light, and reflective tape will make it easier for people falling overboard and the crew to see the lifebuoy.
All personal flotation devices are designed to achieve the same thing – help you stay afloat. It’s right there in the name.