It is surrounded by coral reefs populated with rusting shipwrecks visible above water. The reefs have been the cause of many shipwrecks. Sable Island history is full of many mysteries, pirates, shipwrecks, and treasures. Also included are sections on California naval installations, California shipbuilding, California shipwrecks, and California lighthouses. Magnetometers are also used to detect archaeological sites, shipwrecks, and other buried or submerged objects. Players are also able to search sunken shipwrecks and islands for interesting and rare equipment. These contacts were with explorers, fishermen and survivors of the numerous shipwrecks. Mermaids are sometimes associated with perilous events such as floods, storms, shipwrecks, and drownings. There are many known shipwrecks off the Pembrokeshire coast with many more undiscovered. There were many shipwrecks on the Crozet Islands. They are believed to be descended from horses who escaped from Spanish galleon shipwrecks. The hermitage also houses votive offerings from sailors who survived shipwrecks. The islands are the site of many shipwrecks. It is one of the best preserved shipwrecks in Australian waters. Sport divers who visit Bikini to dive on the shipwrecks must eat imported food.