What primary flotation device is the B727 equipped with?

The Boeing 727 is primarily equipped with life rafts as its main flotation devices. Life rafts are crucial for ensuring passenger safety during emergency water landings. These devices are designed to accommodate multiple individuals and provide essential buoyancy and protection until rescue teams can reach the survivors.

While inflatable slides and life jackets are also safety devices on the aircraft, they serve different purposes. Inflatable slides are primarily used for evacuation onto solid ground, while life jackets are worn by individuals but are not the primary flotation device used for group survival at sea. Emergency flotation belts are less common and provide personal flotation assistance rather than a collective rescue solution like life rafts do. Therefore, life rafts are recognized as the key flotation device specifically designed for such emergencies on the B727.