ɪt tˈʊk ˌoʊvɚ ɹᵻspˌɑːnsəbˈɪlᵻɾi fɔːɹ ˈɛɹɪəl sɚvˈeɪləns ænd ɡɹˈaʊndkəntɹˈoʊld ˌɪntɚsˈɛpʃən fɹʌmðə ɹˈɔɪəl ˈɛɹ fˈoːɹsᵻz nˈoʊ. fˈoːɹhˈʌndɹɪd ˈeɪɾi sˈɛvən sˈɪɡnəlz jˈuːnɪt ˌɔn wˈʌn dᵻsˈɛmbɚ.
It took over responsibility for aerial surveillance and ground-controlled interception from the Royal Air Force's No. 487 Signals Unit on 1 December.