10.1594/PANGAEA.991494Lenz, Kai-FrederikKai-FrederikLenz0000-0003-3043-8399Kiel UniversitySchneider, Ralph RRalph RSchneider0000-0003-1453-9181Kiel UniversityPapenmeier, SvenjaSvenjaPapenmeier0000-0002-2385-5269Leibniz Institute for Baltic Sea Research, WarnemündeBrembach, KerstinKerstinBrembachLaval UniversityBauer, BenediktBenediktBauerKiel UniversityThamm, ViktoriaViktoriaThammKiel UniversityPANGAEA2026CanadaHudson BayPARASOUNDBinary ObjectBinary Object (Media Type)Binary Object (File Size)Binary Object (MD5 Hash)File contentDATE/TIMELATITUDELONGITUDECommentATLAS Parasound P70 Deep-Sea Parametric Sub-Bottom ProfilerMSM120Maria S. Merian2023-08-17T07:51:52/2023-09-17T21:55:24Dataset10.48433/cr_msm12018887 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalData access is restricted (moratorium, sensitive data, license constraints)During cruise MSM120 (August 17 – September 17, 2023), sub-bottom profiles were acquired in the Labrador Sea and Hudson Bay using the hull-mounted PARASOUND DS3 (PS70) parametric echosounder on RV MARIA S. MERIAN. The PARASOUND system emits high-frequency primary signals (18–24 kHz) and secondary low-frequency signals (0.5–7 kHz) via a narrow 4.5° beam, enabling high-resolution imaging of small-scale seafloor structures and sediment layers down to ~150 m penetration in soft sediments. Data were recorded in single pulse, quasi-equidistant, and transmission-on-request ping modes depending on water depth and operational constraints. Beamforming corrected for vessel motion, and acquisition parameters (sample rate, recording window, and source level) were adapted for shallow and deep-water areas. Raw data including signal amplitude, phase, and system parameters were stored in Atlas Sound Data (ASD) format and exported in SEG-Y and PS3 formats. The dataset provides detailed sub-bottom information for sedimentological and geohazard studies, supporting high-resolution mapping of the Labrador Shelf, Labrador Sea, and Hudson Bay seafloor.Data publishing was realized by Henriette Kolling, Kiel University, Germany-85.76949000000002-55.27083800000002654.01407266.531458