| HMAS Waterhen | |
|---|---|
| Part of Fleet Base East | |
| Waverton, Sydney, New South Wales in Australia | |
&sq=Envato&lang=en&file=File:HMAS_Waterhen_aerial.jpg) HMAS Waterhen | |
&sq=Envato&lang=en&file=File:Location_map_Australia_Sydney.png)  HMAS Waterhen Location in Greater Sydney | |
| Coordinates | 33°50′28″S 151°11′40″E / 33.84111°S 151.19444°E |
| Type | Naval base |
| Site information | |
| Owner | Department of Defence |
| Operator |  Royal Australian Navy (1943–1967); Royal Australian Navy (1967 – present) |
| Site history | |
| In use | 1943 – present |
| Garrison information | |
| Current commander | Commander Fiona Eggins, RAN |
| Past commanders | Commander David Jones, RAN |
HMAS Waterhen is a Royal Australian Navy (RAN) base located in Waverton on Sydney's lower north shore, within Sydney Harbour, in New South Wales, Australia. Constructed on the site of a quarry used to expand Garden Island in the 1930s, the location was used during World War II as a boom net maintenance and storage area. In 1962, the area was commissioned as a base of the RAN, and became home to the RAN's mine warfare forces. Waterhen was the first small-ship base established by the RAN, and from 1969 to 1979 was also responsible for the RAN's patrol boat forces.