Neutral Buoyancy Laboratory

The Neutral Buoyancy Laboratory is an astronaut training facility and neutral buoyancy pool operated by NASA and located at the Sonny Carter Training Facility, near the Johnson Space Center in Houston, Texas.

The pool is 202 feet in length, 102 feet wide, and 40 feet deep, and contains 6.2 million US gallons of water. It contains a full-scale mock-up of the International Space Station (ISS)