Point Marsden Light

A navigation aid consisting of a 3-metre-high (9.8 ft) tower with a single flashing light was installed in 1915. The light which is 85 m (279 ft) above sea level, assists vessels underway at night in Investigator Strait. The need for a navigation aid at Point Marsden was suggested as early as 1882 and was one of four sites recommended for immediate construction of navigation aids in 1912 when the responsibility for navigation transferred from the South Australian government to the Australian government.

https://en.wikipedia.org/wiki/Point_Marsden