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Quick answers
Which local rescue or training agency should I check first?
Use the local lens: coastguard/federation norms and the shop briefing for that bay — not a blog visibility claim.
What is the Thistlegorm?
A British WWII cargo ship bombed in 1941 at Sha'ab Ali, rediscovered for the public by Cousteau-era film, now a mass recreational wreck. Holds are overhead. See wreck-diving.
Is Dahab's Blue Hole a beginner site?
The shallow rim can be snorkelled. The arch and deep hole are an advanced, lethal-if-casual scuba problem. Freedivers use it with a plan or not at all. See freedive-safety.
Jackson Reef?
A Tiran Strait reef, often dived as a drift with a wrecked freighter on the reef in the lore. Current and park rules apply.
Elphinstone and the Brothers?
Offshore marine-park walls, typically liveaboard, with a pelagic reputation. Not a first Sharm house reef.
Abu Dabbab?
A Marsa Alam area known for seagrass and, at times, dugongs, plus a few wreck and reef names. Distance and park manners apply.
Harm clusters on Ras Mohammed current, Thistlegorm depth and silt, Blue Hole deep-air folklore, and deck heat. This is not medical advice.
A cancelled wreck day is a safety decision.
Hazards
- Drift separation — Shark Reef, Tiran.
- Wreck overhead and silt — Thistlegorm holds.
- Blue Hole arch / deep air — A documented fatal pattern.
- Deck heat and dehydration — Sinai and Safaga summers.
- Boat traffic at popular moorings — Ras Mohammed can be a car park.
- Unexploded ordnance talk on war wrecks — Do not touch.
Rules
- SMB on every drift and wreck — The pickup rule.
- No untrained penetration — The wreck chapter.
- No untrained arch — The Hole is a rim or a plan.
- Drink and shade — A desert sea.
- Park brief at Ras Mohammed — Always.
Red flags
- A guide selling the arch to OW cards — Walk.
- Silt in a hold and the group still entering — Turn.
- Someone pocketing a relic — Park and grave.
- Dizziness after deep air on a famous name — End the day, seek care. Not a diagnosis.
First response
- Boat oxygen and chamber pathways (Sharm / Hurghada) — Not a DCI protocol page.
- Stings and coral — Local boat kit, then clinic.
- Not medical advice — Envenomation and DCI are clinical.
Red Sea safety is a SMB and a no on the arch. The cargo hold can wait for a lined, trained day.