A method for a secure transmission of information between a first and a second module is disclosed. The invention also provides for methods of use of such formulations. The processor is operable to execute the one or more modules to cause display of navigation information at the display device. Detector self-test circuitry can be provided to test the on-line fault detector and one or more circuit breakers can be provided to protect the analog device and other devices attached to the analog device. , e-mail or FTP to a predetermined destination or may be saved to local storage, e.