The sea ice drifter trajectories and wave measurements from the Laptev sea cruise, 2021, performed in the context of the NABOS project. Trajectories and wave measurements in this file were obtained by instruments a Sofar Spotter deployed on the ice. For more information about the deployment, see: (XX: add: the paper is not yet published). The data are created, stored, and quality checked using the code available at: https://github.com/jerabaul29/data_release_waves_in_ice_2018_2021/tree/main/Data/2021_September_Laptev_sea/Spotter . More data may be available at this address than in this nc file. Please discuss any question / issue about the present data inside the issue tracker of the github repository.