PugJesus@lemmy.worldM to HistoryPorn@lemmy.worldEnglish · 11 months agoTwo Imperial German sound locators for detecting airplanes, WW1, 1917lemmy.worldimagemessage-square19fedilinkarrow-up1254arrow-down12
arrow-up1252arrow-down1imageTwo Imperial German sound locators for detecting airplanes, WW1, 1917lemmy.worldPugJesus@lemmy.worldM to HistoryPorn@lemmy.worldEnglish · 11 months agomessage-square19fedilink
minus-squareI_Has_A_Hat@startrek.websitelinkfedilinkEnglisharrow-up9·11 months agoI get the ear trumpets, but why the weird goggles?
minus-squareCethin@lemmy.ziplinkfedilinkEnglisharrow-up8·11 months agoI assume magnification to spot planes. Basically binoculars without the need to hold them.
I get the ear trumpets, but why the weird goggles?
I assume magnification to spot planes. Basically binoculars without the need to hold them.