The only infomation about the defence bunker is located in a news articale http://tasmaniantimes.com/index.php/article/in-defence-of-fort-direction ' It’s not that old really, being built during World War II, along with Fort Pierson across the mouth of the river at Tinderbox. Together they covered the shipping that came to and from Hobart and remained vigilant for any invasion force that might arrive at the River Derwent. The defences around southern Tasmania were quite extensive, including concrete bunkers, as with the survivor that can be seen at the northern end of Roches Beach at Lauderdale. The real heritage value of Fort Direction is not it’s stand-alone significance, but as part of the story of the defences of Hobart, forts and batteries that are scattered around the River Derwent and date from the founding of Hobart at Sullivan’s Cove in 1804 and flow through time to 1944, when Hobart ceased to be a defended port.
Lauderdale to Seven Mile Beach Track - The gravel track skirts between Single Hill and the rocky coastline offering spectacular views of Seven Mile Beach and Frederick Henry Bay. The track finishes at the southern end of Seven Mile Beach. The walk takes approximately an hour one way.
There is a short and slightly steep section of track where it crosses a gully midway along. The track becomes steeper at the Seven Mile Beach end with steps providing access onto the beach.
Lauderdale/Roches Beach is overlooked by Single Hill, which is just to the North. Beyond Single Hill is the town of Seven Mile Beach The view from Single Hill gives a clear view of the town of Lauderdale. The view also shows the nearby ABC radio transmitter mast. The Ralph's bay side of Lauderdale reveals a sharp gradient in the bay where the water changes colour.