Equipment Check

At sea, it helps to know your equipment inside and out. Here, Dalton Hardisty from Michigan State University, Alysia Cox from Montana Tech, and Drew Syverson from Yale University test a hydrothermal fluid sampler known as a “major” that they disassembled, cleaned, and reassembled prior to deploying it on a dive by the human-occupied submersible Alvin. (Photo by Ken Kostel, Woods Hole Oceanographic Institution)