Abstract: An air deployable buoyant device for transmitting data on its location and the conditions in the air as it descends to the surface of a body of water, and on conditions on a body of water on a real-time basis is disclosed. The device includes a buoy and a plurality of sensors and a transmitter associated with the buoy. The transmitter transmits data on the location of the device and the conditions in the air and on a body of water on a real-time basis to at least one receiver. The receiver may be located over the horizon or in line of sight with the device. The sensors are in communication with the transmitter, and each sensor measures at least one condition in the air and/or on a body of water to assist in locating a person in the water and provide information on the water conditions to a rescue team. Methods of deploying and using the buoyant device are also disclosed herein.