仅靠仪表操纵地盲目地飞行单靠仪表的操纵飞行员遇到云雾无法用肉眼观察时单凭仪表操纵的仅靠仪表飞行的未经目击的
Blindly flying by relying solely on instruments. When a pilot encounters clouds or fog and cannot observe with the naked eye, flying by relying solely on instruments without being witnessed
以上为机器翻译结果，长、整句建议使用 人工翻译 。