Object

Moonbase Sodium Distress Rocket

Hobson identifies the sodium rocket as the Moonbase's backup distress device, which fires sodium into space to generate a bright flare visible from Earth when radio transmissions fail. Earth Control urges the crew to launch it if responses cease, a desperate measure discussed amid the control room's chaos with the Doctor, Ben, Benoit, and Cybermen present. The rocket remains unused, its potential firing heightens the base's isolation against virus spread and Gravitron sabotage.
3 appearances

Purpose

Ejects sodium into space to create a visible flare signaling distress to Earth when communications break down

Significance

Offers the crew's last hope for external rescue, amplifying urgency as Cybermen silence transmissions and quarantine locks them in, forcing reliance on internal defenses

Appearances in the Narrative

When this object appears and how it's used

3 moments