Relay Station 47 (or Relay Station 047) was a Federation Relay Station 47-type communication relay station that was in service with Starfleet during the mid-24th century. This station was located in Sector Ipai, in close proximity to Starbase 212, Relay Station 194, along the Federation-Klingon border.
On stardate 46455, 2369, Lieutenant Keith Rocha reported for duty at Relay Station 47. As soon as Rocha transferred to the station, Rocha and junior officer, Lt. Uhnari, experienced a great deal of personality conflict. Lt. Uhnari found him "rude, arrogant, and condescending" toward her.
On stardate 46458.3, the two completed their primary system overhaul after they configured the relay controller grid. The following three days were designated for recalibrating and align the antenna systems.
On stardate 46461.3, the USS Enterprise-D investigated the mysterious disappearance of its crew. When Lieutenant Commander Geordi La Forge boarded the station, the only lifeform he found was Lt. Uhnari's pet dog Maura. Evidence of foul play was also found. (TNG: "Aquiel")
According to Star Trek: Star Charts (p. 65) and Stellar Cartography: The Starfleet Reference Library ("Federation Historical Highlights, 2161-2385"), Relay Station 47 was located in the Beta Quadrant.