 During the 70s and 80s, the island was also the forward operating base (FOB) of a Royal Navy Hovercraft unit deployed to assist the Hong Kong government with anti-illegal immigration operations.The Royal Navy unit (Naval Party 1009) was under the control of Cmdr Chris Stafford and two SRN6 Mk6 Hovercraft were continually operated until 1985 when the unit was finally disbanded.Some buildings or military facilities within the Ngong Shuen Chau Barracks are now graded historic buildings.