National Geographic Young Explorers Grantee Erika Bergman is sharing the thrill of diving in a submersible with classrooms and onlookers all over the world. With external and internal cameras mounted on her sub, viewers will experience a new vantage point as Erika pilots through the deep coral reefs of Curacao and Honduras. Follow her expedition and post your comments right here on Explorers Journal or tweet your questions at @erika_bergman
There’s nothing between me and complete corporeal implosion but a 3 inch thick dome of plexiglass.
I am at two thousand, one hundred feet below the surface of the ocean inside the submersible Idabel, exploring the deep reefs of Roatan, Honduras. My mind is focused on the job. What are the oxygen and carbon dioxide levels? With this amperage draw, how long will our batteries last? What will we find at this depth near the reef? Who put the Lord of the Rings soundtrack on the playlist…?
My heart pumps with exhilaration as I do a quick mental calculation of the external pressure. At this depth, the pressure of the surrounding water is 70 times higher than atmospheric. That’s over 1,000 pounds per square inch of water pressing in from all directions; it’s like having a fully grown bull balanced on one hoof on every single square inch of our small protective sphere. Inside the sphere however, we are pleasantly stable at one atmosphere, the same pressure as sea level. The same exact air in fact, from when we closed the hatch at sea level. I hope everyone put on clean socks today.
I’m not frightened of diving deep in a submersible like this one. For the same reason I’m not frightened of walking into a parking garage with thousands of pounds of steel and concrete above my head, because I know that this is what it was built to withstand. Submersibles are even overbuilt, designed and tested to 125 percent of their standard operating depth.
I step down through the conning tower happy in the knowledge that for the next several hours, I’ll be visiting my favorite place in the world, only slightly disappointed that I can’t climb out and swim around down there.
There’s no rush on our descent, we’ve planned to spend over four hours diving deep in the ocean. As we move slowly deeper, a barrage of pale organic detritus from the world above rushes towards our faces like stars rushing by, and out of the stellar landscape emerge the alien life forms that populate inner space.
95% water and nearly invisible, a comb jelly’s most extraordinary feature are the eight rows of cilia which propel them through the water. The tiny cilia scatter light as they move and produce a stunning rainbow effect down the entire length of the comb jelly’s body.
A Jeweled Squid has an asymmetrical pair of eyes. Seen here is the smaller, opaque blue eye which watches below for predators, the opposite is yellow and bulging, looking upwards for prey.
A dive is never long enough.
Have a question about underwater exploration? Ask away on twitter at @erika_bergman.