كيف كان يتم اكتشاف الطائرات العدوه قبل أكتشاف الرادار ؟
STRANGE ACOUSTIC “EARS”
BEFORE RADAR – ON A SWIVEL
BEFORE RADAR – ON A SWIVEL
STRANGE ACOUSTIC “EARS”
BEFORE RADAR – GERMAN
BEFORE RADAR – GERMAN
STRANGE ACOUSTIC “EARS“
BEFORE RADAR – ON WHEELS
BEFORE RADAR – ON WHEELS
STRANGE ACOUSTIC “EARS”
BEFORE RADAR – ENGLAND
BEFORE RADAR – ENGLAND
