Abstract: A method and apparatus for a hierarchical access system for a compartment. The hierarchical access system comprises a moveable barrier, a locking mechanism, and a control unit. The moveable barrier is capable of preventing access to at least one of a first space and a second space in the compartment in the lavatory when the moveable barrier is in a closed position. The locking mechanism is capable of securing the moveable barrier in the closed position. The control unit is capable of unlocking the locking mechanism in a manner that provides different levels of access to the first space and the second space in the compartment in response to receiving an access request.

Abstract: A system is described for determining if two seat buckles are attached. The system includes seat belt portions and corresponding seat buckle members. The system also includes a sensing element located within a first seat buckle member and configured to output signals corresponding to one or both of attachment and non-attachment between the seat buckle members. A transmitter located within the first seat buckle member is configured to receive the signals from the sensing element. The transmitter transmits unique identification information, corresponding with a location of the seat belt, and data corresponding to the signals received from the sensing element. A display unit is configured to receive the unique identification information and data from the transmitter and provide a display indicative of an attachment status between the seat buckle members.

Abstract: A system is described for determining if two seat buckles are attached. The system includes seat belt portions and corresponding seat buckle members. The system also includes a sensing element located within a first seat buckle member and configured to output signals corresponding to one or both of attachment and non-attachment between the seat buckle members. A transmitter located within the first seat buckle member is configured to receive the signals from the sensing element. The transmitter transmits unique identification information, corresponding with a location of the seat belt, and data corresponding to the signals received from the sensing element. A display unit is configured to receive the unique identification information and data from the transmitter and provide a display indicative of an attachment status between the seat buckle members.

Abstract: A method and apparatus for a hierarchical access system for a compartment. The hierarchical access system comprises a moveable barrier, a locking mechanism, and a control unit. The moveable barrier is capable of preventing access to at least one of a first space and a second space in the compartment in the lavatory when the moveable barrier is in a closed position. The locking mechanism is capable of securing the moveable barrier in the closed position. The control unit is capable of unlocking the locking mechanism in a manner that provides different levels of access to the first space and the second space in the compartment in response to receiving an access request.