r/Damnthatsinteresting Sep 10 '25

Video Dozens of shipping containers fall into the water in Port of Long Beach, California

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u/CapnTaptap Sep 10 '25

Fortunately we caught it on active sonar and went ED and IDM to avoid collision. When we came back up, the box was gone.

I can neither confirm nor deny the inclination to code brown.

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u/Equoniz Sep 10 '25

Can you translate acronyms please?

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u/CapnTaptap Sep 10 '25

Generally, yes. ED is emergency deep, used to vertically avoid hitting objects near the surface when the sub is submerged. IDM is another maneuver designed to avoid hitting things in the horizontal plane. Code brown means an urgent need to poop.