PugJesus@lemmy.worldM to HistoryPorn@lemmy.worldEnglish · 2 years agoTwo Imperial German sound locators for detecting airplanes, WW1, 1917lemmy.worldimagemessage-square18linkfedilinkarrow-up1255arrow-down12
arrow-up1253arrow-down1imageTwo Imperial German sound locators for detecting airplanes, WW1, 1917lemmy.worldPugJesus@lemmy.worldM to HistoryPorn@lemmy.worldEnglish · 2 years agomessage-square18linkfedilink
minus-squareCethin@lemmy.ziplinkfedilinkEnglisharrow-up9·2 years 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.