This data set was acquired with a Kongsberg Maritime EM122 Multibeam Sonar during R/V Nathaniel B. Palmer expedition NBP1802 conducted in 2018 (Chief Scientist: Dr. Alison Macdonald, Investigator: Dr. Alison Macdonald). These data files are of MBSystem-compatible format and include Acoustic Backscatter and Swath Bathymetry data that have not been processed. Data were acquired as part of the project(s): Collaborative Research: Global Ocean Repeat Hydrography, Carbon, and Tracer Measurements, 2015-2020. Funding was provided by NSF award(s): OCE14-37015.