Name: The site was named for a wooden tripod navigation beacon which has now been replaced by a simple post. Depth: The bottom is generally from 5 to 10 m deep on the sand. Marine life: The sessile fauna in the swim-throughs and overhangs is very colourful. There are a lot of anemones, sponges and crinoids. Black mussels patches on the sand bottom further out may support large groups of Spiny starfish. The outer reefs have large numbers of Common feather stars and smaller numbers of Elegant feather stars. Perlemoen (abalone) seem to be making a recovery, with numbers of small specimens scattered around the reefs. There is a wide variety of habitats with a wide range of inhabitants. Photography: This is a good photographic site, with a good variety of seaweed, invertebrates and fish. Macro and wide-angle equipment will usually give good results. Topography: Sand bottom with bedrock reef and big boulders, some breaking the surface. There are a few swim-throughs among the boulder groups north of the big rock. The big rock is pretty sheer on the south face, with a few deep crevices and overhangs. There are several medium-sized boulders a little further to the south. The seaward end of the big rock is also quite sheer, with a small cave, and is on a low flattish outcrop. A ridge of medium height extends beyond this outcrop, with another parallel a few metres to the north-west of it. These ridges end about 25 m east of the big rock, and a large sheer-sided boulder rising from the sand bottom at 10 m, to 3 m below sea level stands a bit beyond. Beyond this is a group of lower steep-sided outcrops, about 8m away to the east. There is a relatively high and small one to the south of the group and a much larger but lower one to the north. The gap between them is about 2 m wide with a sand bottom. North of these rocks is an area of the sand bottom at 10 m depth with extensive patches of black mussel. The reef that extends beyond the big rock has a sand patch to the south with some medium and fairly high outcrops. The sand is loose and fairly coarse in this area. To the south of the big rocks, there are some large and medium outcrops and boulders, a few of which nearly reach the surface, and an extensive area of scattered small boulders and outcrops with sand bottom between, getting rockier towards the shore.