Stripping the Buffer Tube

The optical core of a deep-sea cable is thinner than an eyelash, and my hands only tremble when Kenbara Talmani leans over my shoulder to check the laser return.

Out here, seventy miles off the Balearic coast, the Cala-Nador rides three thousand meters of black water. Below our keel, transcontinental data waits inside ninety-six strands of silica glass. Up here in the climate-sealed splice bay, I run a small church of air filters and positive pressure. Twenty-one degrees Celsius. Forty-five percent humidity. No drafts, no dust, and ideally no people.

All I wanted was twenty quiet minutes before midnight watch.

Just twenty minutes to peel the outer polymer jacket off the secondary buffer tube without putting a microscopic hairline fracture in a single filament. If I nicked one, forty gigabits of bandwidth across southern Europe went dark before breakfast.

The thermal stripping clamp rested between my knuckles. The tool was warm, humming at a gentle two kilohertz. I felt the bite through the rubber grips. Not with my eyes, but with the calluses of my thumb and forefinger. The outer polyurethane yielded first, soft like stale rind. Then came the tough aramid yarn beneath it, resisting with a tiny fibrous drag.

Too much torque shears the core. Too little leaves gummy residue on the cladding.

I eased the jaws back three tenths of a millimeter. The cut parted clean. Ninety-six hair-thin filaments slid free into the cradle, bare and gleaming under the fluorescent tubes. Zero tension flaws on the strain gauge.

Flawless.

The pneumatic airlock hissed behind me.

So much for church.

The heavy hatch thumped against its rubber stops. The sterile smell of ionized air took a sudden beating from diesel fumes, damp sea spray, and burnt galley espresso.

"You look like a monk waiting for the rapture, Zerroui."

Kenbara Talmani stepped past the air shower without bothering to let the cycle finish. Her orange offshore coveralls were two sizes too large, sleeves rolled to the elbows to expose forearms dusted with pale gray hydraulic chalk. A smudge of black bearing grease marked the curve of her left collarbone.

My pulse skipped.

A natural reflex when someone breaches quarantine. Obviously.

"You're tracking salt onto the conductive floor," I said. I did not drop my gaze from the fiber bundle. "And your hair is wet."

"It's raining on the aft deck, genius. Some of us actually work outdoors."

She walked straight to my station. Her boots were unlaced at the ankles, flapping against the steel grating with an insolent rhythm. She smelled like cold wind and bitter dark roast. It filled the narrow bay within three seconds, completely overpowering my clean filters.

"Where are your laser goggles?" I asked.

"In my pocket. Relax. I'm not staring into the aperture."

She reached across my elbow. Her movement was quick, casual, and thoroughly illegal under marine safety regulations. Her fingers dipped into my magnetic tray and plucked my calibrated 1.5-millimeter titanium micro-screwdriver from its groove.

She spun it between her knuckles like a drumstick.

"Put that back, Kenbara."

"Why? You aren't using it."

"I use it to adjust the piezo micro-stages every fifteen minutes."

"You haven't adjusted that stage in an hour," she said, leaning an inch closer. "You just like knowing it's lined up with your neat little chalk marks. It's pathological, Massi."

"It's calibration."

"It's superstition."

She leaned her hip against the rim of my bench. Her oversized shoulder brushed my bicep through my cleanroom smock. Heat came off her through the cheap cotton, sharp and humid. My fingers tightened on the thermal clamp.

"I need that driver," I said.

"Earn it."

"I don't play games on company time."

"You're not playing anything," she said, rolling the titanium shaft across the back of her hand. "You're hiding in an air-conditioned box while the rest of the ship gets thrown around by the swell. Nabila says the starboard thruster has a hydraulic tick."

My eyes flicked toward her face. "A tick?"

"A pulse in the feedback line. Nothing fatal yet. But the current down at six hundred meters is chewing on the umbilical." She gestured toward the far bulkhead with the stolen screwdriver. "Your precious acoustic dampening pads aren't doing shit, by the way. I could hear your air compressor whining through my hydrophone feed on channel four."

"Those pads are rated for forty decibels of structural isolation."

"They look like yoga mats for sad engineers."

A dry snort escaped my nose before I could stop it.

Kenbara caught it immediately. Her mouth curved, sharp and victorious. She had dark, sun-bitten skin, sharp cheekbones, and an annoying habit of watching my mouth whenever she scored a point.

"See?" she murmured. "Signs of life. I knew there was a heartbeat in there."

"Give me the driver, Talmani."

"Say please."

"I'll withhold my signature on your seabed telemetry log."

Her eyebrows lifted. "You wouldn't dare. Captain Bensaadi needs that sign-off by midnight."

"Try me. Without my optical continuity verification, your hydrophone logs are legally uncertified ballast. You'll spend morning watch explaining maritime non-compliance to Chief Tahraoui over cold porridge."

She stared at me. Her dark eyes narrowed, measuring the bluff.

I kept my chin level, breathing slow through my nose. Working with fiber optics teaches you how to freeze your rib cage. You learn to turn into stone so a weld doesn't blur.

Kenbara clicked her tongue against her teeth. "You are an absolute menace."

She tossed the titanium driver into the air.

I caught it by the knurled handle before it hit the bench. My fingers closed tight around the metal. It was warm from her palm. A ridiculous jolt ran up the tendons of my wrist. Metal shouldn't hold body heat that fast, but her skin always ran hot.

"Thank you," I said.

"Don't thank me. Sign my sheet."

She pulled a folded carbon-slip clipboard from her oversized thigh pocket and slapped it onto the corner of the granite isolation table. The impact sent a dull thud through the frame.

"Careful," I muttered. "The piezo alignment motors pick up nanometer shifts."

"The table weighs four hundred kilos, Massi. A sheet of paper won't knock it out of plumb."

"Your elbow might."

"My elbow is delicate."

"Your elbow took out a pressure gauge on deck two last Tuesday."

"That gauge was improperly mounted," she replied smoothly.

She leaned both forearms against the heavy granite slab, dropping her chin into her hands to watch me work. Her face was ten inches from my cheek. I could see the tiny constellation of dark freckles across the bridge of her nose, and the faint shine of salt crust along her hairline.

She wasn't wearing her coverall collar pinned shut. The loose neckline showed the hollow of her throat, where a thin gold chain disappeared beneath black work cotton.

I turned back to the splicing rig. My hands were perfectly steady. They had to be.

I took the primary blue fiber from the buffer tube. The stripped silica core was eight microns across, completely invisible unless caught in the reflection of the work lamp. Using ceramic tweezers, I set the filament into the left V-groove clamp. The vacuum hold-down hissed, locking it in place.

Then I reached for the diagnostic monitor.

A small digital screen beside the cradle displayed the core alignment axes. Green crosshairs hovered over the two microscopic silhouettes of the glass ends. The piezo motors were supposed to drift into zero-zero tolerance, driven by micro-steppers that moved in fractions of a wave.

The digital readout flickered.

0.00 µm.

Then the X-axis reading jumped.

0.14 µm.

I stopped breathing. The number shouldn't move. The hydraulic isolation dampers beneath the granite table were supposed to cancel every shudder from the ship's main engines.

0.28 µm.

A soft amber warning square began to pulse in the corner of the diagnostic panel.

"Did you touch the stage?" I asked, keeping my tone flat.

"I haven't moved an inch," Kenbara said.

Her bare right hand was resting flat against the polished edge of the granite slab, fingers splayed over the dark stone.

On the screen, the waveform oscillated in a steady, rhythmic spike. Exactly seventy-two cycles per minute.

It wasn't engine vibration.

"Take your hand off the table," I whispered.

She didn't move her hand. Instead, her fingers curled slightly against the cold stone, and she looked straight at me.

"Make me."