As a scuba diver, both in sport and the military, I have always been acutely aware of a diving condition called Nitrogen Narcosis, also known as the ‘Rapture of the Deep.’ This condition occurs around a depth of 100 feet and can cause varying symptoms and levels of severity among different individuals. Fortunately, I had received thorough training on the subject, understanding what to expect and where it might occur.
One sunny afternoon, my dive buddy Jon and I decided to explore the depths of La Jolla Canyon in San Diego. We were experienced divers along the Southern California coastline, having dived in several locations over the years. I had a background as an army salvage diver in the Army Reserve, while Jon had worked as a commercial diver harvesting agar weed off the Pacific coast. In contrast to the relatively shallow depths along the coast of Southern California, La Jolla Canyon presented a unique opportunity for us to make a ‘bounce’ dive, reaching a depth of 150 feet and staying for approximately five minutes before gradually ascending back to the surface.
As we swam out to a point just above the canyon’s edge, Jon and I exchanged smiles and thumbs up. We were both filled with excitement as we submerged and began our descent. On the way down, we encountered a series of ledges that we could somersault off, adding even more exhilaration to the dive. The canyon itself was dark, eerie, and foreboding, with only the sound of our regulated breathing breaking the silence in the gloomy depths.
We descended smoothly, reaching 75 feet, then 100 feet, and finally 125 feet. At that point, I began feeling a slight lightheadedness, serving as a warning sign. I glanced at Jon, who appeared unaffected, and decided to continue our descent into the depths. It was then that something utterly extraordinary happened.
In an instant, Jon transformed before my eyes, appearing suddenly as a giant iridescent blue fish, reminiscent of a massive sea bass with radiant flashing colors of blue and purple. Strangely, instead of fear, I felt a sense of fascination and awe, as if suspended in space. Yet, thanks to my training, I quickly recognized what was happening—I was experiencing a major episode of Nitrogen Narcosis, and that ‘fish’ was merely a hallucination.
Reacting swiftly, I tugged the emergency inflation cord on the right side of my flotation device. It didn’t respond. Not even a sound. Luckily, I recently had installed a second double sized CO2 cartridge in the left side of my vest. I pulled its release cord and despite the extreme pressure at 125 feet, it released a small amount of CO2 into the vest, providing just enough buoyancy for my ascent to begin.
Kicking as hard as I could, I began my gradual ascent towards the surface. The pressure at 125 feet had compressed my wetsuit so much it was barely buoyant making the beginning of my climb slow and arduous. The surface seemed distant, with only a faint glimmer of light visible.
Alongside my physical challenges, concerns about Jon’s well-being grew. Regrettably, against all diving rules, I had left my buddy behind.
As I continued my ascent, the decrease in pressure caused my speed to increase as my vest expanded, and my wetsuit became more buoyant. Gradually, my head began to clear, and the symptoms of narcosis started to fade. In my frantic search for Jon, I spun in circles, exhaling continuously as I ascended to avoid the risk of lung rupture. Holding my breath while ascending from that depth would have been fatal.
With increasing speed, I streaked towards the surface, the brightness growing as the sun came into view directly above me. Breaking through the surface, I removed my regulator and dive mask, overcome with relief. I scanned the surroundings, searching for Jon, but he was nowhere to be seen.
Suddenly, as I was scanning the area, Jon’s head broke the surface just a short distance away. We locked eyes, both wearing expressions of astonishment and disbelief at the incredible experience we had just shared. In that moment, our relief transformed into laughter, echoing across the water.
Later, as we collapsed on the sandy beach, we shared our stories and relived the adventure. Jon described my odd movements and incoherent gestures just before I pulled my inflation cords and began my ascent. He had stayed behind, unaffected by any symptoms. Then he also began to rise remaining several feet directly below me keeping a watchful eye the entire time.
We packed our gear, cleaned up, and headed home, carrying with us the knowledge that we had experienced firsthand the captivating and dangerous effects of Nitrogen Narcosis.
From that day forward, our understanding of the “Rapture of the Deep” went beyond mere theory. We had felt its strange allure and the potential dangers it posed. This experience reinforced the importance of thorough training, cautious decision-making, and the significance of a reliable buddy system in scuba diving.
As we drove home, exhausted but exhilarated, we knew that this unforgettable encounter with Nitrogen Narcosis in La Jolla Canyon would forever be etched in our memories. And with this newfound insight, we would approach our future dives with a deeper appreciation for the wonders and risks that lay beneath the surface of the sea.