UAE astronaut Sultan Al Neyadi being neutrally balanced by support divers during his training at the NBL; NASA's Neutral Buoyancy Laboratory. Astronauts train in this 6+ million gallon diving tank in preparation for their mission to the ISS; the International Space Station. The NBL helps astronauts perform tasks in a simulated microgravity environment, very similar to what they will experience while living aboard the International Space Station.