Thanks for breaking that down. Didn't think about the need to differentiate between scrap and mine. And yes I was thinking specifically about this instance on the beach which faces much fewer issues than areas covered with vegetation.
The problem on the beach is not vegetation, yes, but uneven land and especially sand and salt water.
While a tank or an AK47 might work in this environment as intended, a robot with fine gears and other relatively delicate moving parts will have trouble with the sand... and the corrosive sea water environment. It will require an extensive amount of maintenance.
