Diving in Kea — Wrecks, Marine Life, and the Britannic

Kea is established as one of Greece’s top diving destinations. The waters around the island hold a remarkable concentration of historically significant shipwrecks within a protected underwater archaeological zone — including the HMHS Britannic, the largest intact ocean liner on the seabed anywhere in the world.

The HMHS Britannic

The HMHS Britannic was the third and largest of the White Star Line’s Olympic-class ships — the youngest sister of both RMS Olympic and RMS Titanic. She was converted to a hospital ship in World War I and sank on 21 November 1916 after striking a German mine in the channel between Kea and Cape Sounion. She went down in 55 minutes; of the 1,066 people on board, most survived.

The wreck was discovered by Jacques Cousteau in 1975. It rests on its starboard side at around 120 metres, with the shallowest upper sections at approximately 80 metres. At 269 metres in length, it is the largest intact passenger ship wreck in the world. Diving the Britannic requires full technical diving certification and is accessible only to properly qualified divers through authorised operators.

Other Wrecks in the Protected Zone

The protected archaeological zone also encompasses three further historically significant wrecks. The SS Burdigala was a French ocean liner torpedoed just ten days after the Britannic sank, in the same channel; the wreck was only discovered in 2008 and lies at technical diving depths. The SS Patris is a 19th-century paddle steamer that sank around 1860; part of the wreck sits at 18 metres, accessible to sport divers. The Junkers Ju 52 — a German WWII transport aircraft — lies at around 28 metres and is one of the only intact aircraft wrecks in the Mediterranean accessible to recreational divers.

Marine Life

The restrictions on fishing within the protected zone have produced a notable recovery in marine life. Populations of grouper, bream and other reef fish are considerably larger here than in fished areas. The wreck structures host communities of sponges, gorgonians and nudibranchs. Octopus are frequently encountered, and dolphins have been spotted regularly in the northern channel.

Operators

Kea Divers is one of the main dive operators on the island, based in Vourkari. They offer technical expeditions to the Britannic and other deep wrecks as well as beginner and intermediate programmes for sport divers on the Patris and reef sites. For freediving, One&Only Kea Island operates a diving residency with Alguhas that includes instruction and guided tours of shallower reef sites.

Practical Tips

• The Britannic requires full technical diving certification — not an introductory dive
• The Patris (18 m) and reef sites are suitable for open-water certified sport divers
• Book Britannic expedition slots well in advance — demand consistently exceeds availability
• The protected archaeological zone begins off Koundouraki and extends north along the coast
• Kea Divers is based in Vourkari — contact them for current availability and certification requirements