Here we provide particle size and biovolume distribution data from an Underwater Vision Profiler 6, mounted on a BGC Argo Float with the WMO number 6904139. The float was deployed at the Atlantic Equator on the 14 July 2021 at 0.01 degree South, 23.04 degree West. Parking depth was set at 1000 m and profiling depth to 2000 m. Profiling frequency was every three days. The float moved east and stayed always very close to the equator until it was deliberately picked up on the 23 March 2022 at 0.03 degrees North and 7.39 degrees West.

The provided data file contains data from the ascend profile and the time the float remained at parking depth. Information of the data type is given in the Profile column, e.g. 0001a_WMO indicates that the corresponding data row was obtained while the float was ascending, whereas 0001p_WMO indicates that the corresponding data row was obtained while the float was at parking depth.