US Military PatchThis is a Special OPS NavSecGrv Maintence Patch. It measures 4" wide x 4 1/8" high The Naval Security Group (NAVSECGRU) was an organization within the United States Navy, tasked with intelligence gathering and denial of intelligence to adversaries. A large part of this is Signals Intelligence gathering, Cryptology and Information Assurance. The NAVSECGRU organization was active from March 1935 to September 2005. In addition to being part of the Navy, NAVSECGRU was also part of the National Security Agency's Central Security Service. The NAVSECGRU organization has been transferred in the Network Warfare Command (NETWARCOM) The free listing tool. List your items fast and easy and manage your active items.