中航机载：子公司陕西东方航空仪表有限责任公司从事卫星导航业务

Group 1 - The core viewpoint of the article is that China Aviation Industry Corporation's subsidiary, Shaanxi Dongfang Aviation Instrument Co., Ltd., is engaged in satellite navigation business, providing satellite navigation products for various types of aircraft, helicopters, and drones [1] Group 2 - The company is involved in the development and supply of satellite navigation systems, indicating a focus on advanced aviation technology [1] - The mention of multiple aircraft types suggests a diversified product offering, which may enhance market competitiveness [1] - The involvement in drone technology indicates alignment with current trends in the aviation industry, particularly in unmanned aerial vehicles [1]