The Circulation in the Romanche Fracture Zone experiment took place in November–December 1994. It was a cooperative effort between American and French scientists aboard the N/O Le Noroit to study the movement of Antarctic Bottom Water (AABW) through the Romanche Fracture Zone. During the 20 day experiment 55 HRP profiles and more than 30 CTD stations were completed, with most of the work concentrated in and around the Zone. Twelve more HRP dives comprising two equatorial sections were made after the work in the Zone to examine the structure of the deep equatorial jets. It was found that very strong eastward velocities in the deepest part of the Zone were responsible for high levels of turbulent mixing of the AABW.