Diving The SS Thistlegorm: The Red Sea’s Underwater WWII Museum
There are wreck dives, and then there is the SS Thistlegorm.
Located in the Strait of Gubal, north of Ras Mohammed, this 126-meter British Merchant Navy ship is widely considered the single best wreck dive on the planet. Unlike many shipwrecks that are stripped of their contents or lie in inaccessible depths, the Thistlegorm sits perfectly within recreational limits (max 30m/100ft) and is still packed with the military cargo it was carrying to North Africa in 1941.
Diving here isn’t just a scuba excursion; it’s a haunting, silent tour through a moment in World War II history.
The Fateful History: October 6, 1941
The Thistlegorm was a merchant vessel refitted with light anti-aircraft weaponry. On its final voyage, it was part of a convoy carrying supplies for the British 8th Army. Because a ship had struck a mine in the Suez Canal, the Thistlegorm was ordered to “Safe Anchorage F” near the Sinai Peninsula to wait.
It was a sitting duck.
On the night of October 5/6, two German Heinkel He 111 bombers were returning from a mission to find the Queen Mary. They missed their primary target but spotted the Thistlegorm at anchor. They dropped two bombs that struck Hold 4, which happened to be full of ammunition.
The resulting explosion was so violent it tore the ship in two and launched two massive steam locomotives—which were welded to the deck—high into the air. They now lie on the seabed 30 meters away from the main hull. The ship sank in minutes, claiming the lives of nine crew members.
The Layout: What You’ll See Underwater
The wreck lies on a sandy bottom, tilted slightly to the port side. Because of the size and the density of things to see, most dive operators offer at least two dives on the site: one for the exterior and one for the internal penetration.
The Cargo Holds: The Main Event
This is why people travel from across the globe to dive here. Entering the cargo holds feels like swimming into a 1940s garage.
Hold 1: Filled with stacks of Lee Enfield rifles, crates of Wellington boots, and aircraft parts (including wings).
Hold 2: This is the “Instagram” hold. It is packed with rows of BSA M20 and Norton 16H motorcycles and Bedford trucks. Many of the vehicles still have their rubber tires and glass windshields intact, though encrusted with silt and marine growth.
The “Universal Carriers”: Small, open-topped armored tracked vehicles can be seen scattered within the holds and near the blast site.
The Stern and the Guns
Moving toward the stern, you’ll see the massive 4.7-inch anti-aircraft gun and a heavy machine gun, still pointing toward the surface as if ready to defend the ship. The stern is separated from the rest of the ship by the “Blast Zone”—a chaotic jumble of twisted metal and unexploded artillery shells that serves as a sobering reminder of the ship’s violent end.
The Locomotives
Don’t forget to swim off the wreck into the sand to find the LMS Stanier Class 8F steam locomotives. Seeing a full-sized train engine resting on the seafloor is one of the most surreal sights in all of diving.
Marine Life on the Wreck
While the history is the draw, the Thistlegorm has become a massive artificial reef, one of the best dive sites in the Red Sea.
The “Resident” Turtles: There are often two large hawksbill turtles that treat the wreck as their home. They are remarkably relaxed around divers.
Schooling Fish: Massive schools of batfish, barracuda, and jacks often swirl around the masts and the bow.
Macro Life: If you look closely at the rusted railings, you’ll find nudibranchs, scorpionfish, and the occasional crocodilefish blending into the metal.
Technical Tips for the Dive
Diving the Thistlegorm is not for complete beginners.
Currents: The site is notorious for strong, unpredictable currents. You will almost always descend and ascend using a mooring line (the “down-line”).
Nitrox is Key: Because the wreck sits between 18 and 30 meters, your No-Decompression Limit (NDL) will disappear quickly on air. Diving with EANx32 (Nitrox) is highly recommended to maximize your time inside the holds.
Silt Awareness: When penetrating the holds, your buoyancy and finning technique (frog kicks only!) must be perfect. One careless kick can “silt out” the hold, ruining visibility for everyone else and creating a safety hazard.
Crowds: This is a popular site. If you’re on a day boat from Sharm El Sheikh, you’ll be sharing the wreck with dozens of other divers. If possible, visit via a Liveaboard; they often time their dives for early morning or late afternoon when the day boats have left.
A Ghostly Reminder
As you swim through the dark hallways of the Thistlegorm, remember that this is a war grave. It is a place of historical significance and human sacrifice. Take photos, marvel at the machinery, but leave everything exactly as you found it. The Thistlegorm is a bridge to the past—one that every diver should cross at least once.