Oceanographic data collected during the EX1503L1 (Tropical Exploration (Mapping I)) expedition on the NOAA Ship OKEANOS EXPLORER in the North Atlantic Ocean from May 8, 2015 - May 13, 2015 (NCEI Accession 0129880)

Multibeam data was collected 24 hours a day and XBT casts were conducted at an interval defined by prevailing oceanographic conditions, not to exceed 6 hours. Additionally, EK60 single beam and sub-bottom profile data was collected 24 hours per day. Data was only collected in foreign waters where clearance was granted. Where no permit was obtained, all data collection systems were shut down in those foreign waters. All multibeam was fully processed according to standard onboard procedures.