Chapter 155 - The Ascent through the Black Abyss
The explosion felt like an iron fist smashing into the bottom of the lockout chamber.
The sound was not an acoustic boom—it was a concussive shockwave that drove the breath from our chests and caused the heavy steel walls of the cylinder to bow inward with a terrifying groan. Through the thick glass of the deck-level viewports, a blinding flash of orange fire illuminated the black water outside, followed instantly by the grinding, catastrophic screech of five thousand tons of hull collapsing under its own weight.
The Leviathan had broken its back on the granite shelf.
The flood valve of the lockout chamber blew open under the immense external pressure.
A torrent of ice-cold Lake Tahoe water—forty degrees Fahrenheit—blasted into the chamber like a firehose. The shock of the freezing water hitting my skin was like being dropped into a vat of liquid nitrogen. My nervous system screamed, every muscle involuntarily tightening as the water level surged from our knees to our chests in less than five seconds.
Arthur, trapped inside his inflated hood, floated upward like a cork, thrashing his hands weakly as his head hit the curved steel ceiling of the chamber.
"Deep breaths!" I shouted at Clara, grabbing the secondary pony bottle and regulator strapped to the wall rack. I shoved the silicone mouthpiece between her chattering teeth. "Breathe! Don't hold it!"
Clara sucked down a desperate gulp of compressed air, her eyes wide as saucers, her hands gripping my wet tactical jacket with death-grip intensity.
The water reached the ceiling.
The last pocket of air vanished.
The lockout chamber was entirely flooded.
With the pressure inside now equalized with the abyssal depths of Lake Tahoe, the hydraulic interlock on the outer escape hatch released with a heavy metallic *thud*.
I looked up through the dark, murky water. The heavy circular hatch above our heads was swinging open into the boundless, lightless abyss of the lake.
I grabbed Arthur’s harness with my left hand. His yellow hood was glowing faintly from an integrated chemical strobe, illuminating his panicked, pale face through the small plastic viewport. With my right arm, I locked Clara into a tight combat swimmer hold, pinning her against my chest.
I took the regulator from her mouth, shoved it into my own, took two deep, measured breaths of compressed gas, and jammed it back into her lips.
Then, I kicked off the metal grating of the ruined chamber with everything my legs had left.
We shot through the open hatch into the open blackness.
The cold was total. It seized my throat, my temples, my fingers, numbing my skin instantly until it felt as though my flesh was being scraped off by broken glass. Lake Tahoe is not the ocean—there is no buoyancy from salt, no warm thermocline in the winter depths. It is pure, high-altitude alpine melt, heavy, clear, and brutally merciless.
Beneath us, the Leviathan died.
A secondary explosion tore through the flooded hull two hundred feet below. A massive bubble of superheated steam and burning fuel erupted from the torn wreckage, rushing upward in a violent, churning maelstrom of white foam and debris. The shockwave pushed us toward the surface, but the violent turbulence spun us like dry leaves in a hurricane.
Clara panicked.
Her legs began flailing wildly, her fingers digging through my wetsuit sleeve, trying to claw the regulator back into her mouth before I had even taken my second breath. Her fingernails gouged into my neck, drawing blood that was washed away instantly by the lake.
I didn't hesitate.
I drove my forearm hard into her collarbone, pinning her violently against my torso and locking my legs around her waist, completely neutralizing her movement. I shoved the regulator into her face, forcing the purge button until the burst of air cleared the water from her throat. She coughed violently into the mouthpiece, bubbles boiling out into the green murk around her mask.
*Exhale,* I thought, glaring into her terrified eyes through the water. *Exhale or your lungs will burst.*
I pointed upward.
One hundred and fifty feet.
The pressure in my ears was screaming. I constantly swallowed, equalizing the brutal squeeze against my eardrums. Arthur was floating rapidly above us, pulled upward by the high buoyancy of his rescue hood, his limp legs trailing behind him like seaweed.
One hundred feet.
The blackness began to fracture. A pale, ghostly emerald light began filtering down through the alpine waters. The sun was shining on Lake Tahoe, somewhere far above this nightmare.
Seventy feet.
The expanding air in our lungs was becoming dangerous. I forced Clara to keep the regulator in her mouth, holding my thumb against her jaw to prevent her from locking her throat. I hummed a continuous, low tone through my nose, forcing a steady stream of micro-bubbles from my lips to vent the expanding gas from my own lungs. If we ascended too fast, the nitrogen expanding in our blood would cause acute bends, crippling us before we ever broke the surface.
Fifty feet.
Suddenly, a massive, dark silhouette cut across the emerald light above us.
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Not a rock. Not a boat.
It was the sleek, black, hydrodynamic hull of a United States Navy combat diver sled—a Swimmer Delivery Vehicle (SDV)—its dual electric thrusters humming silently through the water, sweeping toward our rising bubbles like a hunting shark.
