In order to determine the locationof the leak, the crew had been sealing off small peripheral modules of the space station while Mission Control looked for accelerated pressure drops inside the sealed-off sections.
There's also the more expected bits -- things like keeping track of your motorcar's location in order to retrieve it after a long, confusing day at Disneyland, but the real magic here is the promise of what's to come.
The ground-breaking Core Location uses a combination of Wi-Fi, cellular and GPS readings in order to produce a single, accurate location quickly and in all environments.