中航机载：子公司东方仪器从事卫星导航业务

Group 1 - The core viewpoint of the article is that AVIC Aircraft (600372.SH) has a subsidiary, Dongfang Instrument, which is engaged in satellite navigation business, providing satellite navigation products for various types of aircraft, helicopters, and drones [1] Group 2 - Dongfang Instrument specializes in satellite navigation, indicating a focus on advanced technology in the aviation sector [1] - The company supports multiple aircraft types, which suggests a diversified product offering and potential for growth in different segments of the aviation market [1] - The involvement in drones highlights the company's alignment with emerging trends in the aerospace industry, particularly in unmanned aerial vehicles [1]