PugJesus@lemmy.worldM to HistoryPorn@lemmy.worldEnglish · 1 year agoTwo Imperial German sound locators for detecting airplanes, WW1, 1917lemmy.worldimagemessage-square18fedilinkarrow-up1255arrow-down12
arrow-up1253arrow-down1imageTwo Imperial German sound locators for detecting airplanes, WW1, 1917lemmy.worldPugJesus@lemmy.worldM to HistoryPorn@lemmy.worldEnglish · 1 year agomessage-square18fedilink
minus-squareCethinlinkfedilinkEnglisharrow-up10·1 year agoI assume magnification to spot planes. Basically binoculars without the need to hold them.
I assume magnification to spot planes. Basically binoculars without the need to hold them.