Just one year ago, the Bush administration announced it would keep the ground-based LORAN system operational to serve asabackup for the satellite-based global positioning systems, which are becoming ubiquitous in cars, planes and ships.
And you have a certain amount of redundancy in the systemas well in terms of storage you can remove, a place where pictures and backup files can reside, and a way for files to be moved around without having to play around with cables or network connections.