من طرف boukaissi الجمعة أغسطس 13, 2010 2:04 amكيف كان يتم اكتشاف الطائرات العدوه قبل أكتشاف الرادار ؟
How incoming enemy aircraft were detected before the advent of radar
STRANGE ACOUSTIC “EARS”
BEFORE RADAR – ON A SWIVEL
STRANGE ACOUSTIC “EARS”
BEFORE RADAR – GERMAN
STRANGE ACOUSTIC “EARS“
BEFORE RADAR – ON WHEELS
STRANGE ACOUSTIC “EARS”
BEFORE RADAR – ENGLAND
