Donning the Steinke hood, the testee enters the water and immediately commences a rapid ascent, due to the buoyancy of the escape device. As they ascend, each testee must allow the air in his lungs to escape, this is facilitated by yelling as loudly as possible. Typically they are told to yell "HO HO HO" repeatedly. If one does not forcefully and continuously expel air from the lungs in this manner, they may be gravely injured or killed. The air exiting the lungs is allowed to exit the hood through a set of two one-way valves, keeping the device inflated but not over-inflated. Upon reaching the top, the testee swims to the side, climbs up, removes his Steinke Hood, deflates it, stands at parade rest, and yells "I FEEL FINE", while a corpsman examines the testee.