Chapter 98 - The Ghost Frequency

We breached the auxiliary communications compartment with a single kick to the rusted latch. The room was bathed in the dull green glow of sonar screens and radio multiplexers. Unlike the main command bridge, this station was designed for emergency system management in the event of primary hull breaches.
I sat at the main terminal, propping my captured rifle against the console, and began rapidly typing system overrides into the keyboard.
"What are you doing?" Clara asked, pacing nervously by the door, constantly glancing back down the empty corridor.
"I’m bypassing the submarine’s acoustic masking protocols," I said, fingers flying across the keys. My Navy training took over, decoding the proprietary operating architecture. Julian had modified the control software, but the core foundation was built on military hardware. "Julian's hull is coated in anechoic polymer tiles that absorb active sonar. But if I cycle the emergency high-pressure blowers in an alternating pulse, this hull will act like a giant acoustic drum."
"Will it call the Navy?"
"It will notify every sonar operator from San Diego to Puget Sound that something massive is sitting at the bottom of the trench."
The console beeped sharply. A green confirmation prompt flashed on the screen:
*BALLAST SYSTEM VENT OVERRIDE: ACTIVE.*
Suddenly, the ship's hull began to groan under a series of rhythmic, metallic vibrations. *CLANG. CLANG. CLANG.* The high-pressure air valves fired in sequence against the outer hull, sending a steady acoustic distress code through the water column.
Within seconds, the ship’s primary intercom crackled to life with Julian’s furious voice.
*"Clever, Marcus. Very clever. You just signaled the Seventh Fleet. But did you honestly think I didn't plan for an extraction breach? You’ve condemned every soul on this vessel, including yourself."*
The submarine shuddered violently. A deep, mechanical rumbling vibrated through the deck beneath our feet.
"What is that?" Clara screamed, grabbing the edge of the console to keep from falling.
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I looked at the primary engineering monitor. My blood ran cold.
"He's flooding the outer ballast tanks," I said, my voice grim. "He's taking this ship to crush depth."