Imagine:  You are are a rescue diver.  You have been called to help find survivors of a tug boat that overturned in bad weather.  You and your co-workers decided that on the first day, the weather is too rough and the conditions are too dangerous.  By day two you know that you are are looking for dead bodies.  The boat sits 100 feet deep and here thewater is dark.  Not only that but the swiftly moving water that is kicking up sediment makes the visibility close to zero.  Your only choice is to search by feel with your hands with very limited vision.  The first day that you spend on the seafloor, was difficult.  You and your 3 man team, had to break your way through two locked doors and navigate your way around a boat that landed top down on the ocean floor.  Even with the poor conditions and the very cold water, you found 4 bodies, bringing them to the surface so their families can say a final farewell. The following day you enter the water, hoping to find the 8 remaining crew.  You are feeling around, not knowing whether there are predators in the boat with you.  A voice coming through your mask from the mothership, trying to guide you as best they can through the boat. Suddenly, you see something in arms reach of your face It’s a hand, you tentatively reach toward it, touching it, expecting cold dead flesh.  When you grasp the hand firmly, its fingers curl around your hand.  You are holding the hand of a survivor who has been underwater for 60 hours.  This is the story of the survivor, Harrison Okene.

Video: https://www.bing.com/videos/search?view=detail&mid=94F276190B05BE6F7B2294F276190B05BE6F7B22&q=you+tube+harrison+okene&shtp=GetUrl&shid=a0e813ee-c6cd-4c26-8e03-a56cf5d38ca4&shtk=SGFycmlzb24gT2tlbmUgUmVzY3VlZCBBZnRlciAzIERheXMgVW5kZXIgV2F0ZXIgaW4gU2hpcHdyZWNrIChGdWxsIFZpZGVvKQ%3D%3D&shdk=U3Vydml2ZXMgMyBkYXlzIGluIGFpciBwb2NrZXQgMzBtICgxMDAgZmVldCkgdW5kZXIgd2F0ZXIgKGNvbXBsZXRlIHZpZGVvKQ%3D%3D&shhk=NZhUp2Dvt%2FI1DMBZX3mfxcDnAp9ubJ9Axfk87hDvNQo%3D&form=VDSHOT&shth=OSH.SGIsy1uhT%252FvCxQuskWbFfA

https://www.theguardian.com/world/2013/jun/12/nigeria-sailor-survive-air-pocket

https://www.telegraph.co.uk/news/worldnews/africaandindianocean/nigeria/10115919/Nigerian-cook-tells-how-he-survived-for-three-days-trapped-under-sunken-ship.html