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Horizontal situation indicator

flight instrument used to inform the pilot of an aircraft's heading, especially at landing

Pronunciation
/hɒrɪˈzɒntəl sɪtjʊˈeɪʃən ˈɪndɪkeɪtə/
/ˌhɔrəˈzɑntl ˌsɪʧəˈweɪʃən ˈɪndəˌkeɪdər/
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