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1.The new navigation system uses a lead-in-air indicator to help pilots find their way.
新的导航系统使用一个引航指标来帮助飞行员找到方向。
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2.The aircraft's navigation system is equipped with a lead-in-air indicator that can be used by the pilot.
飞机的导航系统装备有一个引航指标，可以由飞行员使用。
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3. The lead-in-air indicator is crucial for maintaining safe distance from other aircraft.
引航指标对于保持与其他飞机的安全距离至关重要。