1. A method for determining a terrestrial location of an apparatus that is deployed in a generally known geographical region, comprising the steps of: (a) capturing, by the apparatus, an earthbound image of the sky from a terrestrial location at an identified time; (b) communicating, by the apparatus, data representative of the captured earthbound image of the sky; (c) determining the terrestrial location of the apparatus based on the data communicated by the apparatus by comparing the captured earthbound image of the sky to a master mapping of the sky relative to the surface of the Earth.