HMS Association
HMS Association is not a place in the conventional sense but rather one of the most significant and haunting shipwreck sites in British waters, lying on the seabed approximately one mile west of the Outer Gilstone rock near the Scilly Isles. The wreck rests at a depth of around 30 metres and is considered among the most historically important maritime disaster sites in the United Kingdom. On the night of 22 October 1707, the Association — a 90-gun second-rate ship of the line and flagship of Admiral Sir Cloudesley Shovell — struck the rocks of the Scilly Isles along with several other warships, resulting in one of the worst naval disasters in British history. Approximately 1,400 to 2,000 sailors perished that night across the multiple vessels lost, making it a catastrophe that shook the Royal Navy and ultimately helped drive the quest for a reliable method of determining longitude at sea.
The disaster unfolded during the return of the British Mediterranean Fleet from operations during the War of the Spanish Succession. Admiral Shovell's fleet had been navigating home through bad weather, and a fundamental error in calculating longitude placed the fleet much closer to the Scilly Isles than any of the navigators believed. In a tragedy of almost unimaginable scale, the Association struck the Outer Gilstone and sank in under four minutes, taking nearly her entire crew with her. Three other ships — HMS Eagle, HMS Romney, and HMS Firebrand — were also wrecked that night. Admiral Shovell himself briefly survived the sinking but reportedly drowned in the surf near Porth Hellick on the island of St. Mary's, where his body was later found and interred before being exhumed and given a state burial at Westminster Abbey.
The disaster had profound consequences for the history of science and navigation. The catastrophic inability to determine longitude accurately was the direct catalyst for the British government passing the Longitude Act of 1714, which offered a prize of £20,000 to anyone who could devise a practical and reliable method for finding longitude at sea. This eventually led to John Harrison's development of the marine chronometer, a technological breakthrough that transformed global navigation. In this sense, the wreck of HMS Association — lying quietly on the seabed off the Scillies — sits at the very pivot of maritime and scientific history.
The wreck site itself has been explored extensively since its discovery by divers in the 20th century. Royal Navy divers and civilian salvagers have recovered numerous artefacts over the decades, including bronze cannons, anchors, navigational instruments, personal items, coins, and fragments of the ship's structure. Some of the recovered material is displayed at the Isles of Scilly Museum in Hugh Town on St. Mary's, which holds a compelling collection related to the 1707 disaster. The site is designated as a Protected Wreck under the Protection of Wrecked Vessels Act 1973, meaning any diving or disturbance of the site requires a licence from Historic England, and unauthorised interference is a criminal offence.
For those interested in visiting the site as divers, the waters around the Scilly Isles are renowned for exceptional clarity and rich marine life, and licensed diving on or near the Association wreck is possible through specialist operators. The surrounding Atlantic waters have the character of the far west — often wild, sometimes deceptively calm, and always deeply atmospheric. The seabed in this region is rocky and encrusted with marine growth, and the remains of the Association are scattered across the area where the ship broke apart on impact. The experience of diving near the wreck is described by those who have done it as profoundly moving, given the knowledge of the human tragedy that occurred there.
Above the surface, the nearest land is the archipelago of the Isles of Scilly, accessible by ferry or helicopter from Penzance in Cornwall. St. Mary's is the main inhabited island and serves as the hub for visitors. The surrounding seascape — rugged granite outcrops, clear turquoise waters, and the constant sound of Atlantic swells — creates a landscape of austere natural beauty that makes the horror of the 1707 night all the more vivid to contemplate. Birdlife is abundant, grey seals are commonly seen, and the islands have a distinctly remote, end-of-the-world quality that makes them unlike anywhere else in Britain.
Visitors with an interest in the disaster but who do not dive can still engage deeply with the history through the Isles of Scilly Museum, which has dedicated displays on the 1707 wrecks, and by visiting Porth Hellick on St. Mary's where Admiral Shovell's body was found. A commemorative stone marks the spot. The broader context of the disaster — the longitude problem, the founding of the Board of Longitude, and Harrison's chronometers — is explored brilliantly at the Royal Observatory in Greenwich, which holds Harrison's timepieces. The best time to visit the Scilly Isles is late spring to early autumn when sea crossings are more reliable and the weather more accommodating, though the islands can be visited year-round by the hardier traveller.