The SS Thistlegorm sits at 30 metres on the sandy floor of Sha'ab Ali, but its engine room — the prize for technical divers — lies another 15 metres down through narrow companionways where recreational limits no longer apply.
Sharm El Sheikh technical diving grants access to Red Sea sites that remain invisible to open-water certification holders: the Dunraven's bow section at 28 metres, the Carnatic's coal-filled cargo hold beyond 26 metres, and the sheer drop-offs of Ras Mohammed's southern walls, where pelagic hunters circle in the blue at 50 metres and deeper.
The South Sinai coastline became a wreck diving capital not by design but by geography. Shallow reefs claimed dozens of 19th and 20th-century vessels, and the same currents that made navigation treacherous now deliver nutrients that coat steel hulls in soft coral and anthias schools. Technical diving courses arrived in Sharm in the late 1990s, when nitrox and trimix certifications allowed divers to extend bottom time and manage nitrogen narcosis at depths where standard air becomes dangerously intoxicating. Today, the town's dive centres hold IANTD, TDI, and PADI Tec certifications, and their compressors can fill cylinders with helium-oxygen blends for dives past 40 metres.
Trimix diving removes the narcosis that clouds judgment below 30 metres, replacing some of the nitrogen in breathing gas with helium. The result is clear-headed penetration of the Thistlegorm's holds, where motorcycles and Bedford trucks rest in rows, or exploration of the Carnatic's split hull, where wooden ribs frame a seabed of coal and porcelain. Decompression stops — staged ascents where inert gases leave tissue slowly — become the longest part of these dives. A 25-minute dive to 55 metres may require 40 minutes of stops on the way up, hanging on a line at 21, 12, 9, and 6 metres while the body off-gasses.
Ras Mohammed National Park enforces a seven-euro conservation fee per diver per trip, paid at the dive centre before departure. Sites open at 07:00, and technical dive operators prefer morning departures when visibility exceeds 30 metres and thermoclines have not yet formed. The park's southern tip holds the Shark and Yolanda reefs, where walls plunge past recreational limits into open water patrolled by grey reef sharks and occasional hammerheads.
9 hr
