Various buildings and properties in Fremantle were requisitioned as part of the support of the base, and remained so until late 1945.
Other facilities further from the coast were also utilised for support, such as the Byford armament depot, which stored torpedoes and mines.
Also anti-aircraft gun installations were set up near the base.
4000 tons of ammunition including torpedoes was stored at US Navy 137 – 7 Naval Ammunition Depot (7NAD) at Springhill, near Northam.

Construction of a slipway for the maintenance of submarines and other vessels was begun in 1940 and completed in September 1942.
The slipway was in use until 1998 and is now home to HMAS Ovens as part of the Western Australian Maritime Museum.

Coastal defences for the seaward approaches to Fremantle, the Fremantle Fortress, included batteries on Rottnest Island (2), the suburban beaches between Swanbourne and Point Peron at the lower end of Cockburn Sound (3), Garden Island (4), as well as at the mouth of the harbour (2).

Heavy anti-aircraft gun stations were concentrated mostly along the coast around Cockburn Sound.
 The northernmost was at Cottesloe, and the southernmost was at South Rockingham.
 Light anti-aircraft gun sites were much more confined to the Fremantle Harbour area (8) and Swan River, Melville Water area (6).
 Also there were 20 anti-aircraft searchlight stations as back-up to the gun stations.
Various buildings and properties in Fremantle were requisitioned as part of the support of the base, and remained so until late 1945. Other facilities further from the coast were also utilised for support, such as the Byford armament depot, which stored torpedoes and mines. Also anti-aircraft gun installations were set up near the base. 4000 tons of ammunition including torpedoes was stored at US Navy 137 – 7 Naval Ammunition Depot (7NAD) at Springhill, near Northam.
Construction of a slipway for the maintenance of submarines and other vessels was begun in 1940 and completed in September 1942. The slipway was in use until 1998 and is now home to HMAS Ovens as part of the Western Australian Maritime Museum.
Coastal defences for the seaward approaches to Fremantle, the Fremantle Fortress, included batteries on Rottnest Island (2), the suburban beaches between Swanbourne and Point Peron at the lower end of Cockburn Sound (3), Garden Island (4), as well as at the mouth of the harbour (2).
Heavy anti-aircraft gun stations were concentrated mostly along the coast around Cockburn Sound.  The northernmost was at Cottesloe, and the southernmost was at South Rockingham.  Light anti-aircraft gun sites were much more confined to the Fremantle Harbour area (8) and Swan River, Melville Water area (6).  Also there were 20 anti-aircraft searchlight stations as back-up to the gun stations.
Fremantle submarine base