Which of the following is a feature of a Type IV (4) flotation device?

A Type IV flotation device, often referred to as a throwable device, is specifically designed to be thrown to a person in the water who needs assistance. This feature is crucial because it allows for immediate rescue efforts without requiring the rescuer to enter the water. Typically, this type of device includes items like life rings, buoyant cushions, and similar devices that can be tossed to someone in distress.

This device does not need to be worn at all times, which is why the option that states it must be worn is not applicable. While automatic inflation and a focus on children are characteristics associated with other types of flotation devices, they do not pertain to Type IV devices. Instead, the emphasis is on the throwable nature and its use in rescue scenarios, making it a vital piece of safety equipment in various water settings.