These dataset was collected in the equatorial Atlantic during ILAB-SPARC experiment conducted aboard N/O Pourquoi Pas? in Fall 2018. The seismic data sample the oceanic lithosphere extending between the Romanche Transform Fault to the Charcot Fracture Zone. Refraction data were collected during the ILAB-SPARC experiment. The provided refraction data were recorded on 25 Ocean Bottom Seismometer (OBS data) instruments (from 25 to 50) and span source-receiver offsets from ~-100 km to 100 km.Finally, we provide our final velocity model obtained by analyzing the OBS data (the data are provided in ascii format (horizontal and vertical grid sizes are 200 m and 50 m, respectively).