We Sent the Ocean a Voice Note

How it begins

The ocean answered in my mother's voice.

Not her words.

Her rhythm.

Three short taps, a pause, then two: the pattern she used on my bedroom door before asking whether I wanted company.

I stared at the acoustic display.

The outgoing status note had contained a machine identifier, a location code, and six seconds of test tone.

No childhood.

No mother.

I replayed the return.

Three. Pause. Two.

On the bridge, Daniel asked whether the lower array had stabilized.

"I need another minute."

"You've had four."

"Then I need a different kind."

He came down the ladder himself.

Outside the observation glass, the water was black. Our work lights caught drifting particles and the occasional pale movement too small to name.

I showed him the signal.

"Could be a reflection," he said.

"It waits until we stop."

We watched the next test.

The array sent its tone.

Silence followed.

Then the return arrived, slightly altered, as though someone had tried the sound and disliked its shape.

Daniel folded his arms.

"What do you want to send?"

"Nothing yet."

That was the first decision we made correctly.

Above us, the survey team prepared to activate the deeper pulse system. Its countdown appeared on the shared screen.

I opened the raw environmental feed.

Every planned pulse coincided with a tightening band of movement beneath the station.

Not a current.

Not random.

The water was withdrawing from the source.

"Pause the survey," I said.

Daniel reached for the intercom.

Before he spoke, the return channel opened again.

This time the pattern was ours.

The machine identifier.

The location code.

Then a gap where the test tone should have been.

On the screen, the deep movement eased.

I put my hand against the cold glass.

For the first time since we arrived, I wondered whether silence could be an answer rather than missing data.