Arbeitsgemeinschaft Rotterdam (AGR) External links Bournemouth University Radar Recollections site A working H2S Mk 9 and NBS as used in the Vulcan, Victor, and Valiant Bomber's Radar – General Survey of the Three Primary Systems Used by Bomber Command – Flight article of September 1945 H2S Equipment (AP2890L) operators manual, Air Ministry, July 1944 Aircraft radars World War II radars World War II British electronics Military radars of the United Kingdom British inventions Military equipment introduced from 1940 to 1944