ETSI EN 303 746-2021 海上定位系统;在 9 GHz 频段(X 频段)(V1.1.1)中运行的海上无线电定位系统中用于无线电链路的无线电发射器和接收器
Maritime Location Systems; Radio transmitters and receivers for radio links in maritime radio location systems operating in the 9 GHz frequency band (X band) (V1.1.1)