Editing Test Stand VII (section)

===Control room===
The control room also had switchboards, a row of four [[periscope]]s, [[manometer]]s, frequency gauges, [[voltmeter]]s and [[ammeter]]s, green/red/white signal lamps, and switches at the propulsion console and guidance panel to dynamically display approximately 15 measurement points within the rocket. Additionally, the control room had a big "X-time" [[countdown]] clock that displayed the time until launch, which was announced via loudspeakers as "''X minus four minutes''", etc. In addition to the control room, the blockhouse also contained offices, a conference room, a small dormitory with double bunks and an adjoining shower, a wash room, and a workshop. A long underground corridor led from the measurement blockhouse to a room in the concrete foundation by the flame pit, and multiple rows of measurement cables covered the walls of the tunnel. A different gradually rising tunnel led from the long flame pit room to the exterior of the arena near the pumphouse ({{langx|de|Pumpenhaus}}). Near the pumphouse were high wooden towers to cool the water, and {{convert|25|ft|m}} high tanks for the recooling water were integrated into the ellipse wall.<ref name=Dornberger/><ref name=Huzel/>