An anonymous reader writes: San Francisco Airport is testing out location-aware beacons to help visually-impaired people navigate around one of its newest terminals, a program it could roll out to the rest of the airport if successful. An early version of the system was shown off to press today for use on Apple iOS devices, though SFO also plans to make it available for Android users and eventually expand the system to serve up information for those who can see. The beacons are coming from an indoor positioning company Indoo.rs and have been installed throughout the terminal. Each beacon will connect to a smartphone app to pop up with information when a user gets within range. For the visually impaired, the system uses Apple's Voiceover technology to read out points of interest as they come on screen, though an early version of the app also gives people visual cues for how to navigate to locations from a directory that can be sorted. That means you could tell it to help you find the nearest power outlet to juice your gear, or the nearest coffee shops to recharge your body.