What defines a throw device in water rescues?

A throw device in water rescues is defined as a tool that aids in victim retrieval by being thrown to the person in distress. This type of device is specifically designed to be used by rescuers to provide an immediate means of assistance to someone in the water, allowing for a safe way to reach or secure the victim without the rescuer having to enter the water themselves. Throw devices often include items like rescue buoys, throw bags with rope, or other similar tools that can be effectively thrown to a victim, providing them with something to grab onto or serve as a lifeline.

The other options, while related to rescue scenarios, don't accurately capture the specific function and purpose of a throw device. For instance, while a throw device may help extend the reach in a rescue effort indirectly, its primary function is to be thrown directly to assist in retrieval. Similarly, while some buoy types may be involved in rescue operations, not all are throw devices. Lastly, tools used to guide boats are important for navigation but do not fall under the category of throw devices that have the primary purpose of victim retrieval in water rescues.