 7. If the red light above this panel is on, the toilet is in use.    When the green light is illuminated you may enter. However, you    must carefully follow all instructions when using the facilities    during coasting (Zero G) flight. Inside there are three    facilities: (1) the Sonowasher, (2) the Sonoshower, (3) the    toilet. All three are designed to be used under weightless    conditions. Please observe the sequence of operations for each    individual facility.  