Modularized UAV / Modularized UAV for maritime rescue

In an accident at sea, It is difficult to rescue the drowning man. This modularized UAV is used for maritime rescue. When the UAV detects that there are accidents at sea, the one will location the position and then approach it. Upon its arrival, the UAV closes its wings and the lifesaving airbag will swell and work. At the same time the UAV dives into water and assembles under water, making the airbag protect the waist of people from being wrecked, and then conducts rescue.