Here is a concise summary of the remarkable survival story of Harrison Odjegba Okene:
**Incident:**
* May 26, 2013: Tugboat Jascon-4 capsized in the Gulf of Guinea, 20 miles off Nigeria's coast, due to a rogue wave.
* 12-man crew on board; all but one presumed dead.
**Survivor:**
* Harrison Odjegba Okene, 29, the vessel's cook, miraculously survived for nearly 3 days (60 hours) on the seafloor, 100 feet (30 meters) down.
* Initially trapped in a bathroom air pocket, he later found another air pocket in the engineer's office.
**Rescue:**
* A deep-sea salvage diving team, responding to retrieve bodies, discovered Harrison alive on May 28.
* Divers stabilized him with hot water, oxygen, and eventually transported him to the surface using a diving bell.
* Harrison spent 2.5 more days in a decompression chamber to safely return to surface pressure.
**Aftermath:**
* Harrison recovered from his ordeal but struggled with PTSD, survivor's guilt, and nightmares.
* He now works on dry land, honoring a pact with God to never return to sea.
Here are the extracted key facts, each with a number and in short sentences, excluding opinions:
1. **Incident Date**: The incident occurred on May 26, 2013.
2. **Location**: The tugboat Jascon-4 sank approximately 20 miles (32 km) off the coast of Escravos, Nigeria, in the Gulf of Guinea.
3. **Circumstances of Sinking**: The tugboat was caught by a large rogue wave and capsized while performing tension tow functions on a Chevron oil tanker.
4. **Security Protocol**: The crew followed a security protocol due to piracy concerns, locking themselves in their rooms while sleeping.
5. **Survivor's Situation**: Harrison Odjegba Okene, the 29-year-old cook, survived because he was outside his cabin, using the bathroom, when the boat capsized.
6. **Depth of Wreck**: The tugboat sank nearly 100 feet (30 meters) to the seabed, coming to rest upside down.
7. **Initial Rescue Attempt**: An immediate rescue operation was launched, but it was called off due to no evidence of survivors.
8. **Air Pocket Details**: Harrison found an air pocket approximately 4 feet (1.2 meters) high in the engineer's office.
9. **Temperature at Depth**: At 100 feet (30m) down, Harrison faced significant cold, unlike the pleasant 81.9°F (27.7°C) at the surface.
10. **Rescue Team**: A deep sea salvage saturation diving team from DCN Global, led by the dive support vessel Lewek Toucan, was hired to retrieve the lost crew members.
11. **Discovery of Survivor**: Diver Nico Van Heerden discovered Harrison alive approximately 60 hours after the sinking.
12. **Air Supply**: Harrison's air pocket was estimated to have enough oxygen to last about two-and-a-half days due to compression.
13. **CO2 Buildup**: Harrison inadvertently helped absorb CO2 by splashing water, preventing lethal levels.
14. **Rescue Process**: Harrison was warmed with hot water, fitted with an oxygen mask, and then ascended in a diving bell to avoid decompression sickness.
15. **Decompression**: Harrison spent an additional 2.5 days in a decompression chamber to safely adjust to surface pressure.
16. **Outcome**: Of the 12 crew members, Harrison was the sole survivor, with 10 bodies recovered and the search for the 11th called off due to dangerous conditions.
17. **Aftermath**: Harrison made a full recovery, now lives in Warri, Nigeria, and no longer works on boats due to PTSD and a pact with God.