Importance of Radio?

Marie’s radio set symbolizes a lifeline to safety, and thus its eventual compromise becomes more poignant in that it represents a disconnect from the safety of the United Kingdom while she is in occupied France. Through her training, Marie begins to see the radio as “a kind of armor and without it she would be exposed” (100), and thus feels a deep sense of betrayal when she discovers that the radio had been compromised, noting “[t]he radio, which had been their lifeline, had also now proved their undoing” (258).