batch_auto_20260713 202607131256465730 BOEM ESP geoESPIS ESPIS@boem.gov Bureau of Ocean Energy Management Passive Acoustic Monitoring (PAM) Program for the Northern Gulf of Mexico HDR Environmental, Operations and Construction HDR Environmental, Operations and Construction The program objective was to design and field test implementation of a large-scale, multi-year, underwater passive acoustic monitoring in the northern Gulf of Mexico. Underwater acoustic data were collected within a defined study area over an approximately 24-month period using a mix of stationary and mobile platforms. Data were analyzed to characterize the existing soundscape (including sounds contributed by both natural and anthropogenic sources). A site-specific three-dimensional (3D) underwater sound propagation numerical model was setup and used to assess sound focusing and defocusing effects caused by 3D variations in underwater bathymetry. 15000000 U.S. Department of the Interior, Bureau of Ocean Energy Management, Environmental Studies Program https://doi.org/10.13039/100012475 M17PC00001 10.67297/9A1DBF https://boem.gov/awardpages/100159