Deflector room

From Memory Alpha, the free Star Trek reference

The deflector room was the area of a starship from which repairs and modifications could be made to the ship's deflector relays and similar systems.

In 2293, Captain James T. Kirk entered the deflector room of the USS Enterprise-B in order to modify the main deflector dish to emit a resonance beam that would allow the vessel to escape from a crippling energy ribbon. Kirk was able to complete the modifications, allowing the Enterprise to escape, before an energy tendril from the ribbon struck the ship, destroying the deflector room and apparently killing Kirk. (Star Trek Generations)