A decade ago, China began introducing the HQ-9 for use by its army and navy (on ships).

在十年以前，中国推出HQ - 9用于陆军和海军(舰载)使用。

youdao

In Bahrain, at another military base well out of the public eye and set apart from that country's simmering unrest, Royal Navy personnel man the naval HQ known as the UK Maritime Component Command (UKMCC), directing Britain's minesweepers and frigates around the Gulf, in co-ordination with the far larger US Navy 5th Fleet headquarters.

BBC: 'East of Suez': Are UK forces returning?