https://doi.pangaea.de/10.1594/PANGAEA.996848Achterberg, Eric PieterEric PieterAchterberg0000-0002-3061-2767GEOMAR - Helmholtz Centre for Ocean Research KielPANGAEA20261 sec resolutionUnderway cruise track measurementsAL656Alkor (1990)AI BaseCamp - Helmholtz DataHub Earth & Environment (AI_BaseCamp)DAM Marine Data - Research Vessels (DAM_ResearchVessels)GEOMAR - Helmholtz Centre for Ocean Research Kielhttps://ror.org/02h2x01612026-07-13T05:59:35/2026-07-24T05:59:26Datasethttps://doi.pangaea.de/10.1594/PANGAEA.99684739.1 MBytesapplication/zipCreative Commons Attribution 4.0 InternationalRaw data acquired by position sensors on board RV Alkor during expedition AL656 were processed to receive a validated master track which can be used as reference of further expedition data. During AL656 data from the Seapath 330 system, the Furuno GP-170 receiver and the SAAB R6 system were used to calculate the mastertrack. Data were downloaded from Insightics Marine DSHIP Extraction (https://dship.o2a-data.de/) with a resolution of 1 sec. Processing and evaluation of the data is outlined in the data processing report. Processed data are provided as a master track with 1 sec resolution derived from the position sensors' data selected by priority and a generalized track with a reduced set of the most significant positions of the master track.8.71984210.17942353.87059954.328514