The Umbilicus was a 370-mile-long cable that kept the Satellite of Love tethered to Earth during Season 6 and Season 7. The Umbillicus could be used to send objects from the SOL to Deep 13 and back. Originally it was connected to Gypsy with objects being sent and received through her mouth. This was later changed to an oven-like hatch on the bridge of the Satellite of Love. The Umbilicus was disconnected when Dr. Forrester had to leave Deep 13 at the end of season 7.