Marine mechanic Brian Durante, left, and Alvin pilot Mike Skowronski stand in Alvin’s new personnel sphere before the long process of installing all the equipment that had to fit inside. (Tom Kleindinst, Woods Hole Oceanographic Institution)

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Marine mechanic Brian Durante, left, and Alvin pilot Mike Skowronski stand in Alvin's new personnel sphere before the long process of installing all the equipment that had to fit inside. (Tom Kleindinst, Woods Hole Oceanographic Institution)