Earthdawn - Who Really Kaers?
Use of this talent requires Navigation Charts. The adept can read maps, chart courses and even guide an airship safely through the skies, circumventing storms and turbulence, flying creatures and other hazards. To pinpoint their location, navigators must be able to see the sky and must possess a set of navigator’s charts. Navigation most often means relying on the constellations of the Passions, the movement of the sun and similar astrological phenomena for direction. Most maps have the constellations drawn around their borders for use with Shantaya’s sextant and similar navigational tools. Consequently, navigation is most effective on clear nights when the stars shine brightest.
More details in the Players Companion