Electromagnetic measurements of combined sea-ice thickness and snow depth were performed on the landfast sea ice of Atka Bay, Antarctica.The data were obtained by an EM31 (Geonics) mounted in a kayak and pulled behind a snowmobile along a predefined transect.The EM31 was operated in Vertical CoPlanar (VCP) mode, where the coil plane is oriented perpendicular to the surface. The measured apparent conductivity was calibrated against combined sea-ice thickness and snow depth in the field and the resulting curve was approximated by an exponential function.As the electromagnetic measurements only yield the combined sea ice thickness and snow depth, additional ruler-stick measurements of snow depth were recorded in parallel.These observations contribute to the Antarctic Fast Ice Network (AFIN).