https://doi.pangaea.de/10.1594/PANGAEA.994786Beck, AaronAaronBeck0000-0001-9669-0138GEOMAR - Helmholtz Centre for Ocean Research KielPANGAEA20261 sec resolutionUnderway cruise track measurementsAL648Alkor (1990)DAM Underway Research Data (DAM_Underway)DataHub Earth and Environment of the Helmholtz Association (DataHub)GEOMAR - Helmholtz Centre for Ocean Research Kielhttps://ror.org/02h2x01612026-03-16T05:28:19/2026-04-03T15:08:47Datasethttps://doi.pangaea.de/10.1594/PANGAEA.99478566.9 MBytesapplication/zipCreative Commons Attribution 4.0 InternationalData access is restricted (moratorium, sensitive data, license constraints)Raw data acquired by position sensors on board RV Alkor during expedition AL648 were processed to receive a validated master track which can be used as reference of further expedition data. During AL648 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 DAVIS SHIP data base (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.Due to sensitive information, this dataset is only available on request. Please contact the chief scientist Aaron Beck directly via email: ajbeck@geomar.de10.1794700554.3285208