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Underway geophysics

While transiting between Costa Rica and Site 1256 during Expedition 335, we collected echo sounder data over most of 860 km of trackline and magnetometer data over most of 730 km of trackline away from shipping lanes. The profile covers the early record of spreading between the Cocos and Pacific plates. Magnetic and bathymetric data were also collected on the transit from Site 1256 to Panama.