The VB-6 Felix was a precision guided munition developed by the United States during World War II. It was one of the precursors of modern anti-ship missiles. Created by the National Defense Research Committee, Felix relied on infrared to detect and home on targets, in clear weather, especially ships at sea at night. It was this property which earned the weapon its name, after the ability of cats to see in the dark. Successful trials led to Felix being put in production in 1945, but the Pacific War ended before it entered combat.