Inflatable radar signal device

A RADAR signal device, comprising:

• a liquid tight, buoyant housing that can be actuated from a closed storage configuration to an open release configuration;
• a gas cylinder disposed within the housing, the gas cylinder is charged with a lifting gas;
• at least two inflatable balloons within the housing, the balloons are fluidly connectable to the gas cylinder to permit inflation of the balloons by the lifting gas, the balloons are tethered to the housing, and the balloons are made of a metallized plastic film that is RADAR-reflecting;
• an actuatable gas release mechanism that when actuated releases the lifting gas from the gas cylinder into the balloons in order to inflate the balloons;
• an actuatable balloon release mechanism that can actuate the housing from the closed storage configuration to the open release configuration to permit release of the balloons from the housing so that when the balloons are inflated, the balloons float upwardly above the housing while remaining tethered to the housing;
• the balloons are tethered to the housing in a manner so that when the balloons are inflated one of the balloons floats at a first height while a second balloon floats at a second height greater than the first height;
• and
• a communication antenna capable of receiving a trigger signal, wherein the RADAR signal device is activated based on the trigger signal.