Atun is a Japanese freighter wreck located in Rabaul, Papua New Guinea. Sunk in the 1990s, the vessel now functions as an artificial reef, with its structure covered in coral and reef life. The site features a combination of wreck, reef, and wall topography. Divers can explore depths ranging from 8 to 25 metres, with an average depth of 15 metres. Access is by boat only. Conditions are generally stable with mild currents and visibility ranging from 15 to 40 metres. The site is suited for intermediate divers, with typical dive times of 45 minutes. Hazards include potential entanglement, sharp coral, and the risks associated with nitrogen narcosis and variable visibility.

Kulau Lodge beach wrecks offer a unique opportunity to explore historical vessels scattered across a depth range of 1 to 40 metres. Accessible via both shore and boat, the site features shallow wreck sections starting just below the surface, suitable for beginner divers. Visibility typically ranges from 10 to 30 metres, with water temperatures remaining consistent between 29 and 30 degrees Celsius. Divers should monitor their depth gauges closely, as the topography drops significantly in certain areas. On-site facilities include parking, toilets, showers, changing rooms, and a rinse station, providing a convenient base for exploring these historical remains.