plˈeɪnz ɑːɹ mˈeɪnli jˈuːzd fɔːɹ spˈɑːɾɪŋ stˈɑːk ænd nˈoʊɾᵻfˌaɪɪŋ ðə stˈɑːkmɛn ɔnðə ɡɹˈaʊnd ʌv ðɛɹ loʊkˈeɪʃən vˈaɪəɹ ɐ sˌiːbˈiː ɹˈeɪdɪˌoʊ.
Planes are mainly used for spotting stock and notifying the stockmen on the ground of their location via a CB radio.