What is the self-contained Cartridge Activated Device used for in relation to flotation gear?

The self-contained Cartridge Activated Device (CAD) is specifically designed to inflate flotation gear, making option B the correct choice. These devices typically contain a pressurized gas or a solid fluid that, when activated, allows for rapid inflation of life jackets or flotation devices. This feature is crucial for ensuring immediate buoyancy in emergency situations, enabling individuals to stay afloat when they have fallen into water or are involved in rescue operations.

The CAD operates through a mechanism that activates when submerged or upon pulling a cord, releasing the gas to fill the buoyancy chamber of the flotation gear almost instantaneously. This technology is vital for surface rescue swimmers and others utilizing flotation gear, as it enhances safety and aids in quick response times during rescues.

In contrast, signaling distress is not the primary function of the CAD, although other devices, such as flares or whistles, may serve that purpose. Backup oxygen and enhancing buoyancy are also not the main roles of a CAD—while it contributes to buoyancy through inflation, its primary focus is on activating flotation devices rather than providing additional buoyancy independently.