We sincerely thank Matt Stahl and Tom Pettigrew for constructing an operational PCS, and Matt Stahl, Jürgen Hohnberg, and Masa Kawasaki for invaluable help during PCS operations on Leg 164. Indeed, PCS operations could not have been accomplished successfully without the expertise of shipboard engineering participants. Portions of the data presented here were collected by Matt Stahl, Jürgen Hohnberg, and Ryo Matsumoto.