Camp Collins was a coastal radar installation.
A total of six installations were built in WW II to protect the approaches of Cape Town Harbour and Simonstown Harbour. 
The radar stations were used for targeting and range finding for the nine BL 9.2-inch MkX coastal defense guns in the Da Gama, Llandudno and Scala Batteries.
The other five stations were: Blouberg Hill, Signal Hill, Slangkop / Camp Cobra, Cape Point and Hangklip.