Lockheed Martin recently released this video of twilight operations aboard USS Wasp (LHD 1) during ship suitability sea trials, also known as Developmental Test Phase Two (DT-II). As of August 18, the two F-35Bs participating in DT-II, airframes BF-1 and BF-5, had completed a total of 40 short takeoffs and 41 vertical landings.

Should DT-II be completed successfully, the U.S. Navy and U.S. Marine Corps expect to have all the data necessary to support certification for future F-35B Lighting II shipboard operations in anticipation of initial operating capability in 2015.