Searching Maritime Alert Messages

The National Geospatial Intelligence Agency supports the U.S. military and intelligence communities.

We have four NGA reports with 90 pages of maritime broadcast warnings from the U.S. Navy and “Navarea IV”. Help us sift through them, find incidents that may be of interest and decode any information in them.

The PDFs are below. You can also query specific regions and dates using a form on the NGA database. We are looking at subregions 52, 53, 54 and 56.