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Why Britain Abandoned the £5.5B HMS Sussex Sunken Treasure Salvage

The 1694 sinking of the English warship HMS Sussex near the Strait of Gibraltar could potentially assert legal ownership rights for a salvage operation, according to The Telegraph. The vessel is carrying a cargo of 10 tons of…

Why Britain Abandoned the £5.5B HMS Sussex Sunken Treasure Salvage

The 1694 sinking of the English warship HMS Sussex near the Strait of Gibraltar could potentially assert legal ownership rights for a salvage operation, according to The Telegraph. The vessel is carrying a cargo of 10 tons of gold coins valued by modern estimates at up to £5.5 billion, intended to finance the Duke of Savoy’s campaign against French King Louis XIV during the Nine Years’ War.

History of HMS Sussex and Its Lost Treasure

According to historical research cited by The Telegraph, the warship was dispatched to the Mediterranean carrying funds to support the Duke of Savoy’s military efforts against French forces. If recovered, the sunken treasure would make HMS Sussex one of the most valuable shipwrecks.

Previous Salvage Efforts and Diplomatic Disputes

In 2001, following a three-year search using sonar and remotely operated underwater vehicles, the American deep-sea exploration firm Odyssey Marine Exploration announced a 99 percent certainty of locating the wreck at a depth of 821 meters in the western Mediterranean. The UK government subsequently signed an agreement with the company to identify, excavate, and salvage the remains, sharing any recovered treasure.

However, the project stalled due to diplomatic friction with Spain. Although HMS Sussex was a British naval vessel and legally British property, Spain claimed jurisdiction over the surrounding waters and disputed ownership. Declassified diplomatic cables published by The Telegraph revealed that British officials privately worried the dispute was damaging broader relations with Madrid. Baroness Holt, then deputy head of the British embassy in Madrid, warned in a cable that the Odyssey project posed an unnecessary threat to bilateral ties and urged the termination of the agreement. A 2005 U.S. diplomatic cable also noted that then-Spanish Culture Minister Carmen Calvo vowed to block the search unless it happened over her dead body. Lacking sustained backing from the UK government, the agreement with Odyssey Marine Exploration eventually expired.

While international maritime law allows coastal states to claim territorial waters up to 12 nautical miles, the UK has historically limited Gibraltar’s territorial waters to 3 nautical miles. Because the HMS Sussex wreck lies east of Gibraltar in an area where the UK has never claimed territorial sovereignty, legal analysts suggest the site rests in international waters where Britain holds ownership rights under international maritime law, opening the door for potential new recovery efforts.

About the author: Daniel Perez - News Editor

Former field producer and on‑air correspondent covering U.S. elections and Latin American politics. Daniel’s bilingual expertise powers our fast‑breaking coverage and live blogs. Daniel Perez anchors AchyNewsy.com’s real‑time news desk—breaking stories with accuracy, speed, and context.