A border surveillance upgrade has been given a green light by the Department of Homeland Security.

The Remote Video Surveillance System, or RVSS, upgrade has been deemed to be at full operating capability by Customs and Border Protection, according to a General Dynamics news release.

Located on elevated towers and structures, the RVSS uses electro-optical and infrared sensors to observe the southern U.S. border.

"This key milestone was achieved after two years of successful deployment and field testing along the southern border and underscores the operational impact this solution provides to the U.S. Border Patrol," General Dynamics said. "The RVSS capability is currently operational in Nogales, Douglas, Naco, Yuma, and Ajo, Ariz., with relocatable deployments planned in McAllen and Laredo, Texas in 2017."