The A-3B (SS-A-16) was slightly larger than the RV-A-8 and the last produced and tested vehicle of the Hermes missile program. It was designed as a tactical surface-to-surface missile carrying a 1,000 lb warhead with a 150-mile range but never achieved that range in practice. It had a thrust of 22,600 lb-force. By 1953–1954 six A-3Bs were test launched at White Sands, five successfully. One of the most important developments of the Hermes A-3 program was the first inertial guidance system tested on a ballistic missile. None of the Hermes missiles became operational, but did provide experience in the design, construction, and handling of large-scale missiles and rocket engines. The Hermes program was canceled in 1954.