Abstract: A container mounted on a balloon is borne aloft by the balloon when the balloon is inflated. Compressed gas is provided in the container. A trigger device couples the container to the balloon and is affixed to the cover of a compartment of a craft for supplying the gas to the balloon to inflate it when the cover is opened. A radio transmitter in the container transmits distress signals. A light device in the container produces intermittent flashes of light. A switch device connected to the transmitter, light device and the cover of the compartment activates the transmitter and the light device when the cover is opened. A line wound in the compartment has a first end affixed to the craft and a second end affixed to the container for tethering the balloon when it is airborne.