Sector 1 (SRX) is one of the six sectors aboard the B.S.L Research Station connected to the Main Deck via elevator and has corridors leading to Sector 2 and Sector 3. It is a simulation of the SR388 ecosystem used for studies on creatures native to SR388. Much of it is rocky terrain with a small amount of lava, there are also several rooms filled with acid capable of damaging Samus even with her Gravity Suit equipped. When the B.S.L Research Station becomes infested with X parasites, the X invade the atmospheric stabilizers in this region. Samus had to destroy the X attached to the stabilizers.