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",
Type 1945 destroyer their fore and aft, which were to be fitted with radio direction finders. They were to be propelled by two three-bladed propellers, two sets of Wagner turbines, four Wagner-Deschimag boilers feeding high-pressure superheated steam (at and ), intended to give her , and a speed of , , or , depending on if they were at standard load, full load, or deep load, respectively. They were to carry of oil, to give her a range of at . They were calculated to have . Type 1945 destroyer The Type 1945 destroyers were a planned class of destroyers, for the Kriegsmarine,