The ship campaign PS147 (Atlantic Transit) with the German research vessel Polarstern took place from 12 March to 14 April 2025. The transit proceeded from Stanley, Falkland Islands, to Bremerhaven, Germany, with a stopover in Mindelo, Cape Verde, dividing the campaign into two sections, PS147/1 and PS147/2. During the voyage, several climate zones were crossed, including the Intertropical Convergence Zone (ITCZ).Here, we present data from the Portable Atmospheric Measurement box On Sea (PAMOS) with serial number 003. The PAMOS is a fully automated instrument designed for air monitoring on commercial vessels. During PS147, two PAMOS prototypes were operated and tested across the different climate zones encountered during the cruise. The dataset includes GPS positions (from both PAMOS and RV Polarstern), meteorological parameters (air temperature, pressure, relative humidity, relative wind speed and direction, and precipitation measured with a Vaisala WXT536), aerosol properties (particle number concentration from a naneos Partector 2, black carbon from a MA350, and particulate matter from an OPC-R2), and trace gases (CO₂, CO, CH₄, and SO₂ from smartgas sensors). Quality flags are provided for all parameter groups and should be taken into account when using the data. These data form part of a series of standardized datasets of atmospheric observations collected during the PS147 campaign.