The present application is at least directed to an apparatus in a system including a non-transitory memory with instructions stored thereon for decoding a message from a beacon device. The apparatus also includes a processor, operably coupled to the non-transitory memory, configured to execute the instructions of receiving, via a deployment server, data about the system including a decryption key associated with the beacon device. The processor is also configured to execute the instructions of listening for a signal from the beacon device transmitted via low energy. The processor is further configured to execute the instructions of receiving the signal from the beacon device including encrypted information. The processor is even further configured to execute the instructions of decrypting the encrypted information including GPS coordinates. Another aspect of the application is directed to a beacon device in a disconnected system.