The Monument is a challenging shore dive in St Helens, Tasmania, featuring a reef and wall topography that reaches depths between 15 and 50 metres. This site is strictly for advanced divers due to significant tidal currents, cold water temperatures ranging from 12C to 19C, and risks associated with deep diving. Divers must time their entry for slack water to manage the strong currents. Visibility typically fluctuates between 5 and 12 metres. A 7mm wetsuit or drysuit is recommended for thermal protection. The reef is characterised by soft sponge growth, which provides habitat for seahorses, cuttlefish, octopus, and various nudibranchs. Parking is available at the shore entry point.

Devonport Breakwater is a shallow shore dive in St Helens, Tasmania, featuring a combination of rocky reef, kelp forest, and a wreck. With depths ranging from 2 to 4 metres, it is well-suited for beginner divers. Visibility typically spans 7 to 12 metres. Divers can observe common sea stars and very common snails, particularly during August and September. Due to vessel movement in the area, towing a surface marker buoy is essential. Divers should be aware of moderate currents, which can be strong near the breakwater structure. It is recommended to dive early in the morning when boat traffic is lightest and water conditions are generally calmer.

The Platform, also known as Mersey Bluff, is a shore-accessible reef site in St Helens, Tasmania. It offers a shallow dive experience with depths ranging from 2 to 9 metres, averaging 5 metres. The terrain consists of reef structures and rock pools suitable for beginners. Divers should be prepared for cold water temperatures between 12C and 19C, necessitating a thick wetsuit. Conditions are generally mild, though the site is exposed to Bass Strait, which can generate surf, rip currents, and shifting winds. Visibility typically spans 5 to 15 metres. Species recorded around this area include sea stars and snails. Facilities include parking, toilets, showers, and changing rooms.