Final Environmental Analysis of Marine Geophysical Surveys by R/V Marcus G. Langseth off Western Mexico, Eastern Tropical Pacific Ocean

The National Science Foundation (NSF) is funding a marine geophysical survey of the Guerrero Gap on the Pacific coast of Mexico. Lamont-Doherty Earth Observatory (L-DEO) will conduct the survey using the R/V Marcus G. Langseth using a 36-airgun array with a total discharge volume of 3,600 cubic inches. NSF has submitted an Incidental Harassment Authorization (IHA) request and written an Environmental Analysis for the project, on behalf of L-DEO. NMFS has issued many IHAs to L-DEO for similar geophysical surveys around the world, and adopted NSF's EAs for each project.