3 ms·
I think balloons used in military applications were often tethered. https://en.wikipedia.org/wiki/Observation_balloon https://en.wikipedia.org/wiki/Observation
by Kim_Bruning 3y ago
I think balloons used in military applications were often tethered.
https://en.wikipedia.org/wiki/Observation_balloon https://en.wikipedia.org/wiki/Observation_balloon
https://en.wikipedia.org/wiki/Barrage_balloon https://en.wikipedia.org/wiki/Barrage_balloon