acoustic signature active camouflage aircraft airframe arleigh burke class destroyer avro vulcan bayesian bomber carbon fiber contra-rotating propellers contrail corner reflector data dielectric doppler radar electronic countermeasures ferrite fighter aircraft fluidics fuselage gold gulf war houbei class missile boat indium tin oxide infrared iron jet engine la fayette class frigate list of world war ii electronic warfare equipment low-frequency radar metal military flying saucers nato reporting name neoprene particle filter passive radar physical vapor deposition planform plasma stealth propeller pyotr ufimtsev radar radar absorbent material radar cross section radar warning receiver ship skunk works sonic boom stealth aircraft stealth ship submarine subsonic surface-to-air missile surveillance aircraft thrust vectoring united states invasion of panama visby class corvette wind shear wing yehudi lights