V-2 rocket offensive began on 8 September 1944, when "Lehr- und Versuchsbatterie No. 444" () launched a single rocket guided by a radio beam directed at Paris. Wreckage of combat V-2s occasionally contained the transponder for velocity and fuel cutoff. The painting of the operational V-2s was mostly a ragged-edged pattern with several variations, but at the end of the war a plain olive green rocket also appeared. During tests, the rocket was painted in a characteristic black-and-white chessboard pattern, which aided in determining if the rocket was spinning around its longitudinal axis. The original German designation of the rocket was "V2",
Te-1 rocket propelled mine Te-1 rocket propelled mine The Chinese Specialized-1 (特-1, or Te-1) rocket propelled mine project was started by the 710th Research Institute in 1981, and completed by 1987 after more than 100 major design changes. Specialized-1 is planted by surface ships in up to of water. The maximum speed of the mine is greater than 50 m/s (112 mph). In the early 1990s, the Specialized-1 was upgraded with a larger warhead, and the maximum depth of plant was more than doubled. At least two more mines were developed from the Te-1 in the late 1990s; their designations are unknown. Both were