Raw bathymetry data (.kmall format) for the Tuzo Wilson Seamount Complex and southwest coast of Haida Gwaii (PAC2025-M14, 2025)

This raw multibeam data in ".kmall" format was collected with a Kongsberg EM304 MKII multibeam system in September 2025 during the Canpac Valour survey PAC2025-M14 along the Tuzo Wilson Seamount Complex and southwest coast of Haida Gwaii. The .kmall data format is compatible with MB-System format 261. For the bathymetry survey, a mounting pole holding the transducer was installed on the starboard side of the Canpac Valour vessel. Real-time position, roll, pitch, heave, and heading were corrected using a Kongsberg Seatex Seapath 380-5+ system. To characterize the water column, sound velocity profiles were collected at regular intervals with a Valeport Midas CTD. The raw multibeam data files were later processed using Hypack 2025, which was also used to generate the final bathymetric maps. The data set was generated as part of the NorthEast Pacific Deap-sea Exploration Project 2025 (NEPDEP2025).