From October 7 to November 7, 2019, scientists and engineers from NOAA, the Global Foundation for Ocean Exploration, the U.S. Geological Survey, and Bureau of Ocean Energy Management conducted a 29-day expedition aboard NOAA Ship Reuben Lasker along the California, Oregon, and Washington coasts, exploring the deep sea, one of the largest, but least known environments on Earth. While the expedition was underway, video of dives was streamed live.