A large radio tower atop a hill that is surrounded by 3-4 bloodbugs, some brahmin corpses and a trader's corpse near the stairs of the tower. Around the base of the tower are the scattered remains of a trading caravan with no loot of significance. The relay terminal has an unlocked computer with the option to "Extend satellites to amplify signals in the surrounding area." Activating that will reveal several radio signals that weren't available in the area before. North of the tower, a building with a moving searchlight can be seen. Inside there's a bed and an Expert computer terminal, that has protectron controls and spotlight controls. The road just to the north is a patrol route for various enemies.
- 自動無線電訊號，來自麻州核融合廠隔離廠的emergency signal。
- 海上無線電訊號，來自心碎河岸西北邊的Western Bell vessel的mayday signal。
Radio tower 3SM-U81 only appears in Fallout 4.