plan-position indicator
71B class destroyer — The B class was a class of nine destroyers of the British Royal Navy, ordered as part of the 1928 Naval Estimates, launched in 1930 and that commissioned in 1931. The class was similar to the preceding A class, with minor modifications. They saw… …
72Abdiel class minelayer — The Abdiel class were a class of six fast minelayers commissioned into the Royal Navy and active during World War II. They were also known as the Manxman class and as mine laying cruisers .DesignThe Royal Navy ordered the first four ships in 1938 …
73Fishpond — was the code name given to an extension to the British H2S airborne radar system fitted to allied bombers during World War II. It was designed to give early warning of German night fighters approaching in the hemisphere below the carrying… …
74Robert M. Page — Robert Morris Page Pour les articles homonymes, voir Page. Robert Page Robert Morris Page (2 juin 1903 – 15 mai 1992) était un physicien …
75Robert Morris Page — Pour les articles homonymes, voir Page. Robert Page Robert Morris Page (2 juin 1903 – 15 mai 1992) était un physicien américain qui a joué un rôle important dans le dével …
76radar — /ray dahr/, n. 1. Electronics. a device for determining the presence and location of an object by measuring the time for the echo of a radio wave to return from it and the direction from which it returns. 2. a means or sense of awareness or… …
77surveillance radar — noun A plan position indicator radar showing the position of aircraft within an air traffic control area • • • Main Entry: ↑surveillance …
78range — A single calibration blip fed onto the time base of a radial display. The rotation of the time base shows the single blips as a circle on the plan position indicator scope. It may be used to measure range …
79PPI — abbreviation plan position indicator …
80H2S radar — The H2S radar was used in bombers of RAF Bomber Command. It was designed to identify targets on the ground for night and all weather bombing. The transmitter/receiver equipment was officially known as TR3159 (H2S Mk I/ASV VIB) or TR3191 (H2S Mk… …
