片语
higher maritime navigation education试论高等航海教育
maritime radio navigation service海上无线电导航机构
maritime radio navigation mobile station海上无线电导航移动电台
maritime radar and navigation trainer船用雷达和航海训练器
big maritime navigation era大航海时代
maritime navigation established海洋船舶驾驶
big maritime navigation大航海
maritime radio navigation land station水上无线电导航陆地电台