Synchronized Breath

Why does an optical fusion splicer hate living skin?

Because skin radiates heat, pumps blood, and refuses to stop moving. All I wanted was twenty clean seconds of absolute physical stillness to fire a diagnostic test arc before the bridge called down for our status.

Just twenty seconds. The primary blue fiber sat nestled in the magnetic carriage, its 0.11-degree cleave pristine under the twin microscopic lenses. Overhead, the newly freed pneumatic baffle hummed a steady twenty-one degrees Celsius. The air was dry. The granite isolation slab was level. In theory, I had a sterile clean room again.

In practice, Kenbara stood four inches to my left.

Her navy coveralls were still knotted around her hips. The gray tank top was damp across her shoulder blades from wrestling the ducting, and her collarbones gleamed under the strip lights. Every time she shifted her weight from one boot to the other, the scent of bitter black coffee and cold metal cut through the sterile alcohol wash of my bench.

\"Stop hovering, Kenbara.\"

\"I'm not hovering,\" she said. \"I'm providing moral oversight.\"

\"Fiber optics don't need moral oversight. They need a vacuum.\"

\"Too bad. You have me instead.\"

I lowered the splicer's acrylic wind hood. The servo motor whined, sealing the microscopic alignment chamber. On the high-resolution diagnostic monitor, two eight-micron glass cores appeared as dark horizontal bars against a pale green grid. The piezo-electric stepping motors chirped, nudging the left fiber rightward in increments of zero point zero two microns.

The cores crept toward each other. The alignment indicator flashed amber.

Then the digital trace went insane.

A rhythmic waveform rippled across the bottom of the screen. It was not the jagged forty-five-hertz buzz of the starboard thruster's hydraulic leak. It was a slow, rolling wave, pulsing at twelve hertz with a heavy secondary wobble. The core offset leaped from zero microns to half a micron. The estimated attenuation blew past zero point zero two decibels and locked at an unacceptable zero point zero eight.

I frowned at the screen. \"Did Tahraoui spin up the deck winch?\"

\"Tension engines are idle,\" Kenbara said. She leaned over my shoulder to peer at the waterfall display. \"And the seabed acoustic pinger is locked at thirty kilohertz. Nothing on the hull is singing at twelve.\"

Her forearm brushed my bicep as she pointed at the waveform. Her skin was furnace-hot against mine. My pulse jumped straight into my throat.

On the monitor, the twelve-hertz wave doubled in amplitude.

I froze. I stared at the green trace.

\"Kenbara,\" I said.

\"What?\"

\"Take three steps back. Toward the bulkhead.\"

She arched an eyebrow. \"My boots are clean, Massi.\"

\"Just move.\"

She rolled her eyes and stepped away, crossing her arms over her chest. The distance opened between us. Two feet. Three feet.

The green waveform on the screen smoothed out. The ripple flattened into a dead line. Core offset dropped back to zero point zero one microns.

I let out a measured breath through my teeth. \"Unbelievable.\"

Kenbara stepped forward again. \"What was it? Cable drag?\"

The moment her boots stopped six inches from my workstation, the wave returned. It rolled across the oscilloscope, rising and falling in a rhythmic, undulating crest.

She saw it too. Her mouth opened, then clicked shut.

\"No,\" she murmured. \"Tell me that machine isn't reading what I think it's reading.\"

\"It has twin microscopic piezo sensors rated for nanometer deflections,\" I said, keeping my eyes fixed on the glass cores. \"And you're standing inside its acoustic reflection envelope.\"

\"It's picking up my chest?\"

\"It's picking up our chests.\"

She let out a short, incredulous huff of laughter. \"Massi, that's ridiculous. We aren't even touching the granite.\"

\"We don't have to touch it. The air volume in this bay is pressurized. Every breath displaces air against the acrylic hood, and your pulse is hammering hard enough to vibrate a bulkhead.\"

\"My pulse?\" She stepped directly into my space, planting one bare shoulder against my arm. The heat off her skin soaked right through my thin cotton undershirt. \"Check your own monitor, splicer. That twelve-hertz spike isn't a solo act.\"

I looked down at the display.

She was right. The waveform had two distinct peaks that overlapped every four seconds. One rapid and sharp. The other heavy and stubborn. They were drifting closer together with every breath we drew, locking into a tight, sympathetic cadence like two pendulums swinging on the same wooden beam.

My heart was thumping against my ribs. Her breath ghosted across my collarbone, right where she had pressed the icy soda can two minutes ago.

\"You're breathing too fast,\" I said.

\"You're not breathing at all,\" she countered.

\"Because I have eight-micron glass between tungsten electrodes.\"

\"Then breathe, Massi. Or pass out on your precious granite. Your call.\"

I clenched my jaw. Tahraoui would call from the cable deck any second, demanding to know if the primary bundle was ready for the midnight test burn. If I reported a somatic vibration fault, he would laugh me off the radio and log an operational delay.

I tapped the calibration keypad with a single finger. \"We aren't scrubbing the test.\"

\"How do you plan to stop your heart from beating?\"

\"I don't. We synchronize.\"

She stared at me. Her dark eyes caught the green reflection of the alignment grid, sharp and utterly still. \"You want us to breathe on a rhythm?\"

\"At twelve hertz, the displacement minimum occurs at the bottom of full exhalation,\" I said, keeping my cadence clipped and dry. \"Lungs empty, diaphragm locked, somatic tremor drops by seventy percent for a three-second window. That gives the piezo loop enough stability to center the cores.\"

Kenbara tilted her head, her lips twitching with the ghost of a wicked smile. \"You want to choreograph our respiration.\"

\"I want zero point zero zero decibels of loss. Work with me, or go wait in the companionway.\"

\"Oh, I'm definitely staying for this.\"

She didn't back off. Instead, she squared her shoulders and leaned in closer, bracing both palms against the outer steel rail of the workbench. Her ribcage was three inches from mine. In the cool air of the hold, the warmth radiating between our torsos felt like a live heating element.

\"Lead the watch, Massi,\" she whispered.

I watched the trace on the monitor. The twin peaks were still fighting for dominance.

\"Inhale,\" I commanded.

We drew air in together. The green waveform surged upward, peaking against the upper limit. Her chest expanded beside mine; I could feel the microscopic shift of her weight through the deck plates.

\"Hold,\" I said.

Two seconds of suspended silence. The hum of the ship's ventilation faded into background static. My fingers rested light as dust on the twin arc-initiation switches.

\"Out. Slow. All the way to the bottom.\"

We exhaled. The warm air left my mouth as she released hers. The twin waveforms slid down the graph in absolute unison, their peaks flattening into a long, quiet plateau. The green core alignment indicator on the screen flashed from amber to brilliant emerald.

Core offset: 0.0 microns.

I tripped the arc trigger.

Between the micro-electrodes, a violet spark snapped across the gap. The thirty-thousand-volt discharge vaporized microscopic surface impurities and fused the glass cores into an unbroken crystalline cylinder.

The splicer chirped a crisp, electronic victory chime.

A white diagnostic banner flashed across the screen:

TEST DISCHARGE COMPLETE.

SPLICE LOSS: 0.00 dB.

ESTIMATED TENSILE STRENGTH: >200 kpsi.

The number sat there in bright glowing digits. Zero point zero zero. A mathematically perfect fusion weld under offshore sea conditions.

Kenbara let out the breath she had been holding, her shoulders dropping. She looked from the glowing zero on the screen to my face, her mouth curving into that slow, irreverent grin I was beginning to recognize in my sleep.

\"Well, look at that,\" she murmured, her voice rough with amusement. \"The multi-million-dollar telecommunications rig officially accuses us of disturbing maritime peace.\"

Before I could answer, the bulkhead intercom erupted with the shrill, two-tone blast of a priority bridge override.

\"Zerroui, Talmani,\" DPO Cherkani's voice barked through the speaker grille, sharp and breathless. \"Drop whatever you're doing and get up here. Captain Bensaadi wants every department lead at the master console now.\"

Kenbara's smile vanished. Above our heads, the digital barometer readout plummeted through nine hundred and ninety millibars, flashing emergency red across the hold as the hull gave an ominous, deep-throated shudder.

I locked the steel cowl down and drove us toward the ladder.