Hi, thanks for having me on. I've gone back and forth on whether to do this, but I think people need to hear it. I'm an oceanographer. Was, I should say. Thirty-one years with NOAA, retired now. Spent most of my career doing bathymetric surveys, seafloor mapping, that kind of thing. Not glamorous work. You're staring at sonar readouts for twelve hours a day, watching the bottom scroll by like a gray movie nobody wants to see. This was October 2017. We were running the R/V Oceanus out into the Gulf of Mexico, deep water survey. Budget had been slashed that year, so we were operating with a skeleton crew of five. Just enough to keep the ship running and the equipment online. My wife had been on my case about taking the assignment at all. We were supposed to visit her sister that month. I still remember her face when I told her I had to go. That's the kind of thing that sticks with you, if that makes any sense. Anyway. Four days out, we were scanning the Sigsbee Deep. That's the deepest part of the Gulf, runs about 4,300 meters in some spots. We'd mapped most of it before, years earlier, but this was a follow-up survey. New equipment. Higher resolution.
First three days were nothing. Flat abyssal plain, some sediment variation, a few minor features. The kind of data that makes your eyes glaze over. I was running on coffee and about four hours of sleep a night. Third night, I almost called it early. Told myself we'd wrap up the survey grid in the morning and head back. I'm glad I didn't. Day four, around 0300, I was half asleep at the sonar station when the bottom dropped out of my stomach. The return signal had changed.[ Instead of the flat, featureless plain we'd been seeing for hours, there was something there. A shape. And not a natural one. I thought it was instrument error at first. Checked the calibration, ran a diagnostic. Everything was nominal. The shape was still there. I called Dr. Reyes up from his bunk. He'd been doing this longer than me. I wanted someone else to look at it before I started believing what I was seeing.
Reyes came up rubbing his eyes, ready to tell me I was seeing things. Then he looked at the screen and just stopped. Didn't say a word for maybe thirty seconds. The object was triangular. Perfect equilateral triangle, or close enough that the difference didn't matter. And it was massive. We ran the numbers three times. Each side was approximately 270 meters long. For reference, that's almost three football fields. The thing was resting on the seafloor at 3,800 meters depth, partially embedded in the sediment like it had been there a while. The sonar return was strange. Metals give you a hard, bright bounce. This was hard, but there was something else to it. A density we couldn't account for. Reyes said it looked like the signal was being partially absorbed, which shouldn't happen with any material we knew about. We made pass after pass, building up the image. The more detail we got, the less sense it made. The edges were too clean. The angles too precise. There was a raised structure near one vertex, maybe 40 meters tall. Looked almost like a conning tower, if that makes any sense, but the proportions were wrong.
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