Hubberten, Hans-Wolfgang (2025): Master tracks in different resolutions of POLARSTERN cruise PS18/4, Cape Town - Bremerhaven, 1991-03-30 - 1991-05-13, Version 2, 2025-02-17 [dataset]. Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research, Bremerhaven, PANGAEA, https://doi.org/10.1594/PANGAEA.975870