This attachment is designed to be lightweight, use little material and to clip on to the framework of the DJI Phantom 4 drone.
On the sides it has compartments to insert 2L PET bottles that would provide enough boyancy to float the drone and the accessoires, allowing the drone to land on water near a person in distress. In the middle it has a compartment for a standard inflatable life jacket and on top a flare gun can be clipped on so the rescue team could be guided with an additional visual signal.