 It wakes you right back up and sends a little cool spurt to your system. We have to be prepared to fight and win anywhere, and that includes hot environments. Lieutenant Colonel Dave DeGroot is a scientist who studies how heat impacts the body, and he runs the Army Heat Center at Fort Moore. He says the Army has 1,000 arm immersion tables in use across the country. It's low tech. It's inexpensive. It's easy to implement. It's a bucket of water. It's pretty low tech. It is.