The Helicopter Emergency Egress Device 3 (HEED 3) manufactured by Submersible Systems, Inc. is an updated version of the original HEED. A compact, lightweight and reliable self contained breathing apparatus, the HEED 3 is designed to increase the survivability of military and commercial personnel in short-term out-of-air emergencies.
The HEED 3 is a good item to have should you become inverted or trapped underwater. One good hard blow of air clears the unit of water allowing you to start breathing (on-demand) cool dry scuba air. The HEED 3 will give you up to five minutes of air (depending on how calm you stay) which allows you time to properly remove seatbelts and other obstructions and to make your exit.