With UAVs being common throughout the world, why aren’t there many unmanned ground vehicles (UGVs) being used for military applications yet?
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I am not the expert on robotics but it appears (from the little I have done), that it is actually simpler to get a vehicle to fly than to build a small one that navigates the ground well especially in rough terrain.
Humans can climb, navigate rocky and uneven terrain etc and do so fairly quietly. With supplies they can be deployed for days.
A similar robot is bulky, gets stuck easily, is slow and/or noisy and lasts a few hours before running out of fuel. This is not exactly great for many fighting doctrines.
At least an UAV flies fast enough that a few hours allows them to travel significant distances and return.
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