The Titan II GLV (Gemini Launch Vehicle) or Gemini-Titan II was an American expendable launch system derived from the Titan II missile, which was used to launch twelve Gemini missions for NASA between 1964 and 1966. Two unmanned launches followed by ten manned ones were conducted from Launch Complex 19 at the Cape Canaveral Air Force Station, starting with Gemini 1 on April 8, 1964.WIKI
Gemini 11 was the ninth crewed mission of the NASA's Project Gemini. It was commanded by Command Pilot Charles "Pete" Conrad, Jr. and Pulot Richard F. Gordon, Jr. The crew performed a direct-ascent rendezvous with the Agena Target Vehicle on the first orbit and used the Agena rocket engine to put the combined craft in a higher orbit. Astronauts also performed two EVAs and conducted various scientific experiments. The mission started on September 12, 1966, 14:42:26 UTC and, having performed the first totally automatic, computer-controlled reentry, it ended on September 15, 1966, 13:59:35 UTC.
NET: September 12th 1966 - 14:42 UTC
Instantaneous launch window.