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Inflatable vision unit

aircraft safety device deployed in the event of heavy smoke in the cockpit to ensure unobstructed vision of instruments and windows

Pronunciation
/ɪnˈfleɪtəbəl ˈvɪʒən ˈjuːnɪt/
/ɪnˈfleɪdəbəl ˈvɪʒən ˈjunət/