A device for navigation and usage guidance in a navigable space includes a wireless interrogator including an antenna and a driver circuit that transmits an interrogation signal providing power to a passive transponder at a first location in a navigable space and receives from the transponder a return signal. The device includes a portable computing device coupled to the interrogator and configured to parse the return signal for at least a textual element, extract therefrom a unique identifier of the transmitter, identify, in a first data structure the first location and a second location of a user feature, determine a location of the user, retrieve from a second data structure usage data, and generate a usage sequence for using the user feature. The device includes a user output component coupled to the portable computing device and configured to receive and provide to the user the usage sequence.
